Method for transmitting and receiving data in a wireless communication system and apparatus therefor

ABSTRACT

Disclosed herein are a method and a device for transmitting and receiving uplink data in a wireless communication system. According to the present disclosure, a UE may transmit to a base station information related to a capability of the UE and the information may include a subset including at least one transmit precoding matrix indicator (TPMI) supported by the UE. The UE may receive Downlink Control Information (DCI) for transmitting the uplink data from the base station and the DCI may include a TPMI used for the UE to transmit the uplink data. Thereafter, the UE may transmit to the base station the uplink data by using transmission power determined based on the TPMI and the transmission power may be determined according to whether the TPMI is included in the at least one TPMI.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korea Patent Application No.10-2019-0017458, filed on Feb. 14, 2019, which is incorporated herein byreference for all purposes as if fully set forth herein.

BACKGROUND OF THE INVENTION Field of the Invention

The present disclosure relates to a wireless communication system, andmore particularly, to a method for transmitting and receiving data in awireless communication system and a device for supporting the same

Related Art

A mobile communication system has been developed to provide a voiceservice while ensuring an activity of a user. However, in the mobilecommunication system, not only a voice but also a data service isextended. At present, due to an explosive increase in traffic, there isa shortage of resources and users demand a higher speed service, and asa result, a more developed mobile communication system is required.

Requirements of a next-generation mobile communication system should beable to support acceptance of explosive data traffic, a dramaticincrease in per-user data rate, acceptance of a significant increase inthe number of connected devices, very low end-to-end latency, andhigh-energy efficiency. To this end, various technologies areresearched, which include dual connectivity, massive multiple inputmultiple output (MIMO), in-band full duplex, non-orthogonal multipleaccess (NOMA), super wideband support, device networking, and the like.

SUMMARY OF THE INVENTION

An embodiment of the present disclosure provides a method and a devicefor transmitting and receiving data in a wireless communication system.

Furthermore, an embodiment of the present disclosure provides a methodfor transmitting data by using full transmission power configured by abase station when a terminal transmits uplink data to the base station.

Furthermore, an embodiment of the present disclosure provides a methodfor transmitting information associated with a capability of theterminal to the base station in order to determine transmission power ofthe uplink data when the terminal transmits the uplink data to the basestation.

Furthermore, an embodiment of the present disclosure provides a methodfor configuring a Transmit Precoding Matrix Indicator (TPMI) fortransmitting the uplink data to the terminal based on the informationassociated with the capability of the terminal, which the base stationreceives from the terminal.

Furthermore, an embodiment of the present disclosure provides a methodfor transmitting the transmission power of the uplink data with fulltransmission power based on the information associated with thecapability of the terminal, which the terminal transmits to the basestation and the TPMI configured by the base station.

Technical problems to be solved by the present disclosure are notlimited by the above-mentioned technical problems, and other technicalproblems which are not mentioned above can be clearly understood fromthe following description by those skilled in the art to which thepresent disclosure pertains.

In order to solve the technical problem, provided is a method fortransmitting uplink data by a user equipment (UE) in a wirelesscommunication system, which includes: transmitting to a base stationinformation associated with a capability of the UE, in which theinformation includes a subset including at least one transmit precodingmatrix indicator (TPMI) supported by the UE; receiving from the basestation Downlink Control Information (DCI) for transmitting uplink data,in which the DCI includes a TPMI used for the UE to transmit the uplinkdata; and transmitting the uplink data to the base station by usingtransmission power determined based on the TPMI, in which thetransmission power is determined according to whether the TPMI isincluded in the at least one TPMI.

Furthermore, in the present disclosure, when the TPMI is included in theat least one TPMI, the transmission power is full transmission power.

Furthermore, in the present disclosure, a scaling factor for determiningthe transmission power is configured to ‘1’.

Furthermore, in the present disclosure, when the TPMI is not included inthe at least one TPMI, the transmission power is a value smaller thanthe full transmission power.

Furthermore, in the present disclosure, the scaling factor fordetermining the transmission power is configured to a value smaller than‘1’.

Furthermore, in the present disclosure, the method further includesreceiving from a base station an RRC message including the fulltransmission power usable by the UE.

Furthermore, in the present disclosure, the RRC message further includesmode information associated with at least one transmission modeapplicable to the UE.

Furthermore, in the present disclosure, when the information isinformation associated with a specific capability of the UE, thetransmission power is the full transmission power.

Furthermore, in the present disclosure, the method may further includewhen the information is the information associated with the specificcapability of the UE, receiving from the base station a scaling valuefor determining the transmission power, and the transmission powerdetermined based on the scaling value may be evenly distributed among asingle or a plurality of antenna ports using non-zero power fortransmitting an uplink channel.

Furthermore, provided is a user equipment (UE) transmitting uplink datatransmission in a wireless communication system, which includes: one ormore transceivers; one or more processors; and one or more memoriesstoring instructions for operations executed by the one or moreprocessors and connected to the one or more processors, in which theoperations include transmitting to a base station information associatedwith a capability of the UE, in which the information includes a subsetincluding at least one transmit precoding matrix indicator (TPMI)supported by the UE, receiving from the base station Downlink ControlInformation (DCI) for transmitting uplink data, in which the DCIincludes the TPMI used for the UE to transmit the uplink data, andtransmitting the uplink data to the base station by using transmissionpower determined based on the TPMI, and in which the transmission poweris determined according to whether the TPMI is included in the at leastone TPMI.

Furthermore, provided is a method for receiving uplink data by a basestation in a wireless communication system receiving from a UEinformation associated with a capability of the UE, in which theinformation includes a subset including at least one transmit precodingmatrix indicator (TPMI) supported by the UE; transmitting to the UEDownlink Control Information (DCI) for transmitting uplink data, the DCIincludes the TPMI used for the UE to transmit the uplink data; andreceiving the uplink data from the UE by using transmission powerdetermined based on the TPMI, in which the transmission power isdetermined according to whether the TPMI is included in the at least oneTPMI.

Furthermore, provided is a base station receiving uplink data in awireless communication system, which includes: one or more transceivers;one or more processors; and one or more memories storing instructionsfor operations executed by the one or more processors and connected tothe one or more processors, in which the operations include receivingfrom a UE information associated with a capability of the UE, theinformation includes a subset including at least one transmit precodingmatrix indicator (TPMI) supported by the UE, transmitting to the UEDownlink Control Information (DCI) for transmitting uplink data, the DCIincludes the TPMI used for the UE to transmit the uplink data, andreceiving the uplink data from the UE by using transmission powerdetermined based on the TPMI, and in which the transmission power isdetermined according to whether the TPMI is included in the at least oneTPMI.

Furthermore, provided is a device which includes: one or more memories;and one or more processors functionally connected to the one or morememories, in which the one or more processors are configured to transmitinformation associated with a capability of the device, in which theinformation includes a subset including at least one transmit precodingmatrix indicator (TPMI) supported by the UE, receive Downlink ControlInformation (DCI) for transmitting uplink data, in which the DCIincludes the TPMI used for the UE to transmit the uplink data, andtransmit the uplink data by using transmission power determined based onthe TPMI, and in which the transmission power is determined according towhether the TPMI is included in the at least one TPMI.

Furthermore, provided are one or more non-transitory computer-readablemedia storing one or more instructions, in which the one or moreinstructions executed by one or more processors are configured totransmit, by a user equipment (UE), information associated with acapability of the UE, in which the information includes a subsetincluding at least one transmit precoding matrix indicator (TPMI)supported by the UE, receive, by the UE, Downlink Control Information(DCI) for transmitting uplink data, in which the DCI includes a TPMIused for the UE to transmit the uplink data, and transmit, by the UE,the uplink data by using transmission power determined based on theTPMI, and in which the transmission power is determined according towhether the TPMI is included in the at least one TPMI.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the present disclosure and constitute a part of thedetailed description, illustrate embodiments of the present disclosureand together with the description serve to explain the principle of thepresent disclosure.

FIG. 1 is a diagram illustrating an example of an overall systemstructure of NR to which a method proposed in the present disclosure maybe applied.

FIG. 2 illustrates a relationship between an uplink frame and a downlinkframe in a wireless communication system to which a method proposed inthe present disclosure may be applied.

FIG. 3 illustrates an example of a frame structure in an NR system.

FIG. 4 illustrates an example of a resource grid supported by a wirelesscommunication system to which a method proposed in the presentdisclosure may be applied.

FIG. 5 illustrates examples of a resource grid for each antenna port andnumerology to which a method proposed in the present disclosure may beapplied.

FIG. 6 illustrates physical channels and general signal transmissionused in a 3GPP system.

FIG. 7 is a diagram illustrating an example of an antenna array to whicha method proposed in the present disclosure may be applied.

FIG. 8 is a diagram illustrating an example of a beam used for beammanagement.

FIG. 9 is a flowchart showing an example of a downlink beam managementprocedure.

FIG. 10A-B illustrates an example of a downlink beam managementprocedure using a Channel State Information-Reference Signal (CSI-RS).

FIG. 11 is a flowchart showing an example of a receive beamdetermination process of a UE.

FIG. 12 is a flowchart showing an example of a transmit beamdetermination process of an eNB.

FIG. 13 illustrates an example of resource allocation in time andfrequency domains associated with a DL BM procedure using the CSI-RS.

FIG. 14A-B illustrates an example of an uplink beam management procedureusing a Sounding Reference Signal (SRS).

FIG. 15 is a flowchart showing an example of an uplink beam managementprocedure using the SRS.

FIG. 16 is a flowchart showing an example of a CSI associated procedureto which a method proposed in the present disclosure may be applied.

FIG. 17 is a flowchart showing an example of a downlinktransmission/reception operation to which a method proposed in thepresent disclosure may be applied.

FIG. 18 is a flowchart showing an example of an uplinktransmission/reception operation to which a method proposed in thepresent disclosure may be applied.

FIG. 19 is a diagram illustrating an example of a Radio Frequency (RF)chain of an antenna port to which a method proposed in the presentdisclosure may be applied.

FIG. 20 is a diagram illustrating an example of timing advanced to whicha method proposed in the present disclosure may be applied.

FIG. 21 illustrates an example of an operation flowchart of an eNBreceiving uplink data to which a method proposed in the presentdisclosure may be applied.

FIG. 22 illustrates an example of an operation flowchart of an eNBreceiving uplink data to which a method proposed in the presentdisclosure may be applied.

FIG. 23 illustrates an example of an operation flowchart of a UE fordetermining transmission power for transmitting uplink data to which amethod proposed in the present disclosure may be applied.

FIG. 24 illustrates an example of an operation flowchart of an eNB fordetermining transmission power for transmitting uplink data to which amethod proposed in the present disclosure may be applied.

FIG. 25 illustrates a communication system applied to the presentdisclosure.

FIG. 26 illustrates a wireless device which may be applied to thepresent disclosure.

FIG. 27 illustrates a signal processing circuit for a transmit signal.

FIG. 28 illustrates another example of a wireless device applied to thepresent disclosure. The wireless device may be implemented as varioustypes according to a use example/service.

FIG. 29 illustrates a portable device applied to the present disclosure.

DESCRIPTION OF EXEMPLARY EMBODIMENTS

Reference will now be made in detail to embodiments of the disclosure,examples of which are illustrated in the accompanying drawings. Adetailed description to be disclosed below together with theaccompanying drawing is to describe exemplary embodiments of the presentdisclosure and not to describe a unique embodiment for carrying out thepresent disclosure. The detailed description below includes details toprovide a complete understanding of the present disclosure. However,those skilled in the art know that the present disclosure can be carriedout without the details.

In some cases, in order to prevent a concept of the present disclosurefrom being ambiguous, known structures and devices may be omitted orillustrated in a block diagram format based on core functions of eachstructure and device.

Hereinafter, downlink (DL) means communication from the base station tothe terminal and uplink (UL) means communication from the terminal tothe base station. In downlink, a transmitter may be part of the basestation, and a receiver may be part of the terminal. In downlink, thetransmitter may be part of the terminal and the receiver may be part ofthe terminal. The base station may be expressed as a first communicationdevice and the terminal may be expressed as a second communicationdevice. A base station (BS) may be replaced with terms including a fixedstation, a Node B, an evolved-NodeB (eNB), a Next Generation NodeB(gNB), a base transceiver system (BTS), an access point (AP), a network(5G network), an AI system, a road side unit (RSU), a vehicle, a robot,an Unmanned Aerial Vehicle (UAV), an Augmented Reality (AR) device, aVirtual Reality (VR) device, and the like. Further, the terminal may befixed or mobile and may be replaced with terms including a UserEquipment (UE), a Mobile Station (MS), a user terminal (UT), a MobileSubscriber Station (MSS), a Subscriber Station (SS), an Advanced MobileStation (AMS), a Wireless Terminal (WT), a Machine-Type Communication(MTC) device, a Machine-to-Machine (M2M) device, and a Device-to-Device(D2D) device, the vehicle, the robot, an AI module, the Unmanned AerialVehicle (UAV), the Augmented Reality (AR) device, the Virtual Reality(VR) device, and the like.

The following technology may be used in various radio access systemincluding CDMA, FDMA, TDMA, OFDMA, SC-FDMA, and the like. The CDMA maybe implemented as radio technology such as Universal Terrestrial RadioAccess (UTRA) or CDMA2000. The TDMA may be implemented as radiotechnology such as a global system for mobile communications(GSM)/general packet radio service (GPRS)/enhanced data rates for GSMevolution (EDGE). The OFDMA may be implemented as radio technology suchas Institute of Electrical and Electronics Engineers (IEEE) 802.11(Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Evolved UTRA (E-UTRA), or thelike. The UTRA is a part of Universal Mobile Telecommunications System(UMTS). 3rd Generation Partnership Project (3GPP) Long Term Evolution(LTE) is a part of Evolved UMTS (E-UMTS) using the E-UTRA andLTE-Advanced (A)/LTE-A pro is an evolved version of the 3GPP LTE. 3GPPNR (New Radio or New Radio Access Technology) is an evolved version ofthe 3GPP LTE/LTE-A/LTE-A pro.

For clarity of description, the technical spirit of the presentdisclosure is described based on the 3GPP communication system (e.g.,LTE-A or NR), but the technical spirit of the present disclosure are notlimited thereto. LTE means technology after 3GPP TS 36.xxx Release 8. Indetail, LTE technology after 3GPP TS 36.xxx Release 10 is referred to asthe LTE-A and LTE technology after 3GPP TS 36.xxx Release 13 is referredto as the LTE-A pro. The 3GPP NR means technology after TS 38.xxxRelease 15. The LTE/NR may be referred to as a 3GPP system. “xxx” meansa standard document detail number. The LTE/NR may be collectivelyreferred to as the 3GPP system. Matters disclosed in a standard documentopened before the present disclosure may be referred to for a backgroundart, terms, abbreviations, etc., used for describing the presentdisclosure. For example, the following documents may be referred to.

3GPP LTE

-   -   36.211: Physical channels and modulation    -   36.212: Multiplexing and channel coding    -   36.213: Physical layer procedures    -   36.300: Overall description    -   36.331: Radio Resource Control (RRC)

3GPP NR

-   -   38.211: Physical channels and modulation    -   38.212: Multiplexing and channel coding    -   38.213: Physical layer procedures for control    -   38.214: Physical layer procedures for data    -   38.300: NR and NG-RAN Overall Description    -   36.331: Radio Resource Control (RRC) protocol specification

As more and more communication devices require larger communicationcapacity, there is a need for improved mobile broadband communicationcompared to the existing radio access technology (RAT). Further, massivemachine type communications (MTCs), which provide various servicesanytime and anywhere by connecting many devices and objects, are one ofthe major issues to be considered in the next generation communication.In addition, a communication system design considering a service/UEsensitive to reliability and latency is being discussed. Theintroduction of next generation radio access technology consideringenhanced mobile broadband communication (eMBB), massive MTC (mMTC),ultra-reliable and low latency communication (URLLC) is discussed, andin the present disclosure, the technology is called new RAT forconvenience. The NR is an expression representing an example of 5G radioaccess technology (RAT).

Three major requirement areas of 5G include (1) an enhanced mobilebroadband (eMBB) area, (2) a massive machine type communication (mMTC)area and (3) an ultra-reliable and low latency communications (URLLC)area.

Some use cases may require multiple areas for optimization, and otheruse case may be focused on only one key performance indicator (KPI). 5Gsupport such various use cases in a flexible and reliable manner.

eMBB is far above basic mobile Internet access and covers media andentertainment applications in abundant bidirectional tasks, cloud oraugmented reality. Data is one of key motive powers of 5G, and dedicatedvoice services may not be first seen in the 5G era. In 5G, it isexpected that voice will be processed as an application program using adata connection simply provided by a communication system. Major causesfor an increased traffic volume include an increase in the content sizeand an increase in the number of applications that require a high datatransfer rate. Streaming service (audio and video), dialogue type videoand mobile Internet connections will be used more widely as more devicesare connected to the Internet. Such many application programs requireconnectivity always turned on in order to push real-time information andnotification to a user. A cloud storage and application suddenlyincreases in the mobile communication platform, and this may be appliedto both business and entertainment. Furthermore, cloud storage is aspecial use case that tows the growth of an uplink data transfer rate.5G is also used for remote business of cloud. When a tactile interfaceis used, further lower end-to-end latency is required to maintainexcellent user experiences. Entertainment, for example, cloud game andvideo streaming are other key elements which increase a need for themobile broadband ability. Entertainment is essential in the smartphoneand tablet anywhere including high mobility environments, such as atrain, a vehicle and an airplane. Another use case is augmented realityand information search for entertainment. In this case, augmentedreality requires very low latency and an instant amount of data.

Furthermore, one of the most expected 5G use case relates to a functioncapable of smoothly connecting embedded sensors in all fields, that is,mMTC. Until 2020, it is expected that potential IoT devices will reach20.4 billions. The industry IoT is one of areas in which 5G performsmajor roles enabling smart city, asset tracking, smart utility,agriculture and security infra.

URLLC includes a new service which will change the industry throughremote control of major infra and a link having ultra reliability/lowavailable latency, such as a self-driving vehicle. A level ofreliability and latency is essential for smart grid control, industryautomation, robot engineering, drone control and adjustment.

Multiple use cases are described more specifically.

5G may supplement fiber-to-the-home (FTTH) and cable-based broadband (orDOCSIS) as means for providing a stream evaluated from gigabits persecond to several hundreds of mega bits per second. Such fast speed isnecessary to deliver TV with resolution of 4K or more (6K, 8K or more)in addition to virtual reality and augmented reality. Virtual reality(VR) and augmented reality (AR) applications include immersive sportsgames. A specific application program may require a special networkconfiguration. For example, in the case of VR game, in order for gamecompanies to minimize latency, a core server may need to be integratedwith the edge network server of a network operator.

An automotive is expected to be an important and new motive power in 5G,along with many use cases for the mobile communication of an automotive.For example, entertainment for a passenger requires a high capacity anda high mobility mobile broadband at the same time. The reason for thisis that future users continue to expect a high-quality connectionregardless of their location and speed. Another use example of theautomotive field is an augmented reality dashboard. The augmentedreality dashboard overlaps and displays information, identifying anobject in the dark and notifying a driver of the distance and movementof the object, over a thing seen by the driver through a front window.In the future, a wireless module enables communication betweenautomotives, information exchange between an automotive and a supportedinfrastructure, and information exchange between an automotive and otherconnected devices (e.g., devices accompanied by a pedestrian). A safetysystem guides alternative courses of a behavior so that a driver candrive more safely, thereby reducing a danger of an accident. A next stepwill be a remotely controlled or self-driven vehicle. This requires veryreliable, very fast communication between different self-driven vehiclesand between an automotive and infra. In the future, a self-drivenvehicle may perform all driving activities, and a driver will be focusedon things other than traffic, which cannot be identified by anautomotive itself. Technical requirements of a self-driven vehiclerequire ultra-low latency and ultra-high speed reliability so thattraffic safety is increased up to a level which cannot be achieved by aperson.

A smart city and smart home mentioned as a smart society will beembedded as a high-density radio sensor network. The distributed networkof intelligent sensors will identify the cost of a city or home and acondition for energy-efficient maintenance. A similar configuration maybe performed for each home. All of a temperature sensor, a window andheating controller, a burglar alarm and home appliances are wirelesslyconnected. Many of such sensors are typically a low data transfer rate,low energy and a low cost. However, for example, real-time HD video maybe required for a specific type of device for surveillance.

The consumption and distribution of energy including heat or gas arehighly distributed and thus require automated control of a distributedsensor network. A smart grid collects information, and interconnectssuch sensors using digital information and a communication technology sothat the sensors operate based on the information. The information mayinclude the behaviors of a supplier and consumer, and thus the smartgrid may improve the distribution of fuel, such as electricity, in anefficient, reliable, economical, production-sustainable and automatedmanner. The smart grid may be considered to be another sensor networkhaving small latency.

A health part owns many application programs which reap the benefits ofmobile communication. A communication system can support remotetreatment providing clinical treatment at a distant place. This helps toreduce a barrier for the distance and can improve access to medicalservices which are not continuously used at remote farming areas.Furthermore, this is used to save life in important treatment and anemergency condition. A radio sensor network based on mobilecommunication can provide remote monitoring and sensors for parameters,such as the heart rate and blood pressure.

Radio and mobile communication becomes increasingly important in theindustry application field. Wiring requires a high installation andmaintenance cost. Accordingly, the possibility that a cable will bereplaced with reconfigurable radio links is an attractive opportunity inmany industrial fields. However, to achieve the possibility requiresthat a radio connection operates with latency, reliability and capacitysimilar to those of the cable and that management is simplified. Lowlatency and a low error probability is a new requirement for aconnection to 5G.

Logistics and freight tracking is an important use case for mobilecommunication, which enables the tracking inventory and packagesanywhere using a location-based information system. The logistics andfreight tracking use case typically requires a low data speed, but awide area and reliable location information.

In a new RAT system including NR uses an OFDM transmission scheme or asimilar transmission scheme thereto. The new RAT system may follow OFDMparameters different from OFDM parameters of LTE. Alternatively, the newRAT system may follow numerology of conventional LTE/LTE-A as it is orhave a larger system bandwidth (e.g., 100 MHz). Alternatively, one cellmay support a plurality of numerologies. In other words, UEs thatoperate with different numerologies may coexist in one cell.

The numerology corresponds to one subcarrier spacing in a frequencydomain. Different numerologies may be defined by scaling referencesubcarrier spacing to an integer N.

Definition of Terms

eLTE eNB: The eLTE eNB is the evolution of eNB that supportsconnectivity to EPC and NGC.

gNB: A node which supports the NR as well as connectivity to NGC.

New RAN: A radio access network which supports either NR or E-UTRA orinterfaces with the NGC.

Network slice: A network slice is a network created by the operatorcustomized to provide an optimized solution for a specific marketscenario which demands specific requirements with end-to-end scope.

Network function: A network function is a logical node within a networkinfrastructure that has well-defined external interfaces andwell-defined functional behaviour.

NG-C: A control plane interface used on NG2 reference points between newRAN and NGC.

NG-U: A user plane interface used on NG3 references points between newRAN and NGC.

Non-standalone NR: A deployment configuration where the gNB requires anLTE eNB as an anchor for control plane connectivity to EPC, or requiresan eLTE eNB as an anchor for control plane connectivity to NGC.

Non-standalone E-UTRA: A deployment configuration where the eLTE eNBrequires a gNB as an anchor for control plane connectivity to NGC.

User plane gateway: A termination point of NG-U interface.

Overview of System

FIG. 1 illustrates an example of an overall structure of a NR system towhich a method proposed in the present disclosure is applicable.

Referring to FIG. 1, an NG-RAN consists of gNBs that provide an NG-RAuser plane (new AS sublayer/PDCP/RLC/MAC/PHY) and control plane (RRC)protocol terminations for a user equipment (UE).

The gNBs are interconnected with each other by means of an Xn interface.

The gNBs are also connected to an NGC by means of an NG interface.

More specifically, the gNBs are connected to an access and mobilitymanagement function (AMF) by means of an N2 interface and to a userplane function (UPF) by means of an N3 interface.

NR (New Rat) Numerology and Frame Structure

In the NR system, multiple numerologies may be supported. Thenumerologies may be defined by subcarrier spacing and a CP (CyclicPrefix) overhead. Spacing between the plurality of subcarriers may bederived by scaling basic subcarrier spacing into an integer N (or μ). Inaddition, although a very low subcarrier spacing is assumed not to beused at a very high subcarrier frequency, a numerology to be used may beselected independent of a frequency band.

In addition, in the NR system, a variety of frame structures accordingto the multiple numerologies may be supported.

Hereinafter, an orthogonal frequency division multiplexing (OFDM)numerology and a frame structure, which may be considered in the NRsystem, will be described.

A plurality of OFDM numerologies supported in the NR system may bedefined as in Table 1.

TABLE 1 μ Δƒ = 2^(μ) · 15[kHz] Cyclic prefix 0 15 Normal 1 30 Normal 260 Normal, Extended 3 120 Normal 4 240 Normal

The NR supports multiple numerologies (or subcarrier spacing (SCS)) forsupporting various 5G services. For example, when the SCS is 15 kHz, awide area in traditional cellular bands is supported and when the SCS is30 kHz/60 kHz, dense-urban, lower latency, and wider carrier bandwidthare supported, and when the SCS is 60 kHz or higher therethan, abandwidth larger than 24.25 GHz is supported in order to overcome phasenoise.

An NR frequency band is defined as frequency ranges of two types (FR1and FR2). FR1 and FR2 may be configured as shown in Table 2 below.Further, FR2 may mean a millimeter wave (mmW).

TABLE 2 Frequency Corresponding Range frequency Subcarrier designationrange Spacing FR1  410 MHz-7125 MHz  15, 30, 60 kHz FR2 24250 MHz-52600MHz 60, 120, 240 kHz

Regarding a frame structure in the NR system, a size of various fieldsin the time domain is expressed as a multiple of a time unit ofT_(s)=1/(Δf_(max)·N_(f)). In this case, Δf_(max)=480·10³, andN_(t)=4096. DL and UL transmission is configured as a radio frame havinga section of T_(f)=(Δf_(max)N_(f)/100)·T_(s)=10 ms. The radio frame iscomposed of ten subframes each having a section ofT_(sf)=(Δf_(max)N_(f)/1000)·T_(s)=1 ms. In this case, there may be a setof UL frames and a set of DL frames.

FIG. 2 illustrates a relation between an uplink frame and a downlinkframe in a wireless communication system to which a method proposed inthe present disclosure is applicable.

As illustrated in FIG. 2, uplink frame number i for transmission from auser equipment (UE) shall start T_(TA)=N_(TA)T_(s) before the start of acorresponding downlink frame at the corresponding UE.

Regarding the numerology μ, slots are numbered in increasing order ofn_(s) ^(μ)∈{0, . . . , N_(subframe) ^(slots,μ)−1} within a subframe andare numbered in increasing order of n_(s,f) ^(μ)∈{0, . . . , N_(frame)^(slots,μ)−1} within a radio frame. One slot consists of consecutiveOFDM symbols of N_(symb) ^(μ), and N_(symb) ^(μ) is determined dependingon a numerology used and slot configuration. The start of slots n_(s)^(μ) in a subframe is aligned in time with the start of OFDM symbolsn_(s) ^(μ)N_(symb) ^(μ) in the same subframe.

Not all UEs are able to transmit and receive at the same time, and thismeans that not all OFDM symbols in a downlink slot or an uplink slot areavailable to be used.

Table 3 represents the number N_(symb) ^(slot) of OFDM symbols per slot,the number N_(slot) ^(frame,μ) of slot of slots per radio frame, and thenumber N_(slot) ^(subframe, μ) of slots per subframe in a normal CP.Table 4 represents the number of OFDM symbols per slot, the number ofslots per radio frame, and the number of slots per subframe in anextended CP.

TABLE 3 μ N_(symb) ^(slot) N_(slot) ^(frame,μ) N_(slot) ^(subframe,μ) 014 10 1 1 14 20 2 2 14 40 4 3 14 80 8 4 14 160 16

TABLE 4 μ N_(symb) ^(slot) N_(slot) ^(frame,μ) N_(slot) ^(subframe,μ) 212 40 4

FIG. 3 illustrates an example of a frame structure in a NR system. FIG.3 is merely for convenience of explanation and does not limit the scopeof the present disclosure.

In Table 4, in case of μ=2, i.e., as an example in which a subcarrierspacing (SCS) is 60 kHz, one subframe (or frame) may include four slotswith reference to Table 3, and one subframe={1, 2, 4} slots shown inFIG. 3, for example, the number of slot(s) that may be included in onesubframe may be defined as in Table 3.

Further, a mini-slot may consist of 2, 4, or 7 symbols, or may consistof more symbols or less symbols.

In regard to physical resources in the NR system, an antenna port, aresource grid, a resource element, a resource block, a carrier part,etc. may be considered.

Hereinafter, the above physical resources that can be considered in theNR system are described in more detail.

First, in regard to an antenna port, the antenna port is defined so thata channel over which a symbol on an antenna port is conveyed can beinferred from a channel over which another symbol on the same antennaport is conveyed. When large-scale properties of a channel over which asymbol on one antenna port is conveyed can be inferred from a channelover which a symbol on another antenna port is conveyed, the two antennaports may be regarded as being in a quasi co-located or quasico-location (QC/QCL) relation. Here, the large-scale properties mayinclude at least one of delay spread, Doppler spread, frequency shift,average received power, and received timing.

FIG. 4 illustrates an example of a resource grid supported in a wirelesscommunication system to which a method proposed in the presentdisclosure is applicable.

Referring to FIG. 4, a resource grid consists of N_(RB) ^(μ)N_(sc) ^(RB)subcarriers on a frequency domain, each subframe consisting of 14·2μOFDM symbols, but the present disclosure is not limited thereto.

In the NR system, a transmitted signal is described by one or moreresource grids, consisting of N_(RB) ^(μ)N_(sc) ^(RB) subcarriers, and2^(μ)N_(symb) ^((μ)) OFDM symbols, where N_(RB) ^(μ)≤N_(RB) ^(max, μ).N_(RB) ^(max, μ) denotes a maximum transmission bandwidth and may changenot only between numerologies but also between uplink and downlink.

In this case, as illustrated in FIG. 5, one resource grid may beconfigured per numerology μ and antenna port p.

FIG. 5 illustrates examples of a resource grid per antenna port andnumerology to which a method proposed in the present disclosure isapplicable.

Each element of the resource grid for the numerology μ and the antennaport p is called a resource element and is uniquely identified by anindex pair (k,l), where k=0, . . . , N_(RB) ^(μ)N_(sc) ^(RB)−1 is anindex on a frequency domain, and l=0, . . . , 2^(μ)N_(symb) ^((μ))−1refers to a location of a symbol in a subframe. The index pair (k,l) isused to refer to a resource element in a slot, where l=0, . . . ,N_(symb) ^(μ)−1.

The resource element (k,l) for the numerology μ and the antenna port pcorresponds to a complex value a_(k,l) ^((p,μ)). When there is no riskfor confusion or when a specific antenna port or numerology is notspecified, the indexes p and μ may be dropped, and as a result, thecomplex value may be a_(k,l) ^((p)) or a_(k,l) .

Further, a physical resource block is defined as N_(sc) ^(RB)=12consecutive subcarriers in the frequency domain.

Point A serves as a common reference point of a resource block grid andmay be obtained as follows.

-   -   offsetToPointA for PCell downlink represents a frequency offset        between the point A and a lowest subcarrier of a lowest resource        block that overlaps a SS/PBCH block used by the UE for initial        cell selection, and is expressed in units of resource blocks        assuming 15 kHz subcarrier spacing for FR1 and 60 kHz subcarrier        spacing for FR2;    -   absoluteFrequencyPointA represents frequency-location of the        point A expressed as in absolute radio-frequency channel number        (ARFCN).

The common resource blocks are numbered from 0 and upwards in thefrequency domain for subcarrier spacing configuration μ.

The center of subcarrier 0 of common resource block 0 for the subcarrierspacing configuration μ coincides with ‘point A’. A common resourceblock number n_(CRB) ^(μ) in the frequency domain and resource elements(k, l) for the subcarrier spacing configuration μ may be given by thefollowing Equation 1.

$\begin{matrix}{n_{CRB}^{\mu} = \left\lfloor \frac{k}{N_{sc}^{RB}} \right\rfloor} & \left\lbrack {{Equation}\mspace{14mu} 1} \right\rbrack\end{matrix}$

Here, k may be defined relative to the point A so that k=0 correspondsto a subcarrier centered around the point A. Physical resource blocksare defined within a bandwidth part (BWP) and are numbered from 0 toN_(BWP,i) ^(size)−1, where i is No. of the BWP. A relation between thephysical resource block n_(PRB) in BWP i and the common resource blockn_(CRB) may be given by the following Equation 2.n _(CRB) =n _(PRB) +N _(BWP,i) ^(start)  [Equation 2]

Here, N_(BWP,i) ^(start) may be the common resource block where the BWPstarts relative to the common resource block 0.

Physical Channel and General Signal Transmission

FIG. 6 illustrates physical channels and general signal transmissionused in a 3GPP system. In a wireless communication system, the UEreceives information from the eNB through Downlink (DL) and the UEtransmits information from the eNB through Uplink (UL). The informationwhich the eNB and the UE transmit and receive includes data and variouscontrol information and there are various physical channels according toa type/use of the information which the eNB and the UE transmit andreceive.

When the UE is powered on or newly enters a cell, the UE performs aninitial cell search operation such as synchronizing with the eNB (S601).To this end, the UE may receive a Primary Synchronization Signal (PSS)and a (Secondary Synchronization Signal (SSS) from the eNB andsynchronize with the eNB and acquire information such as a cell ID orthe like. Thereafter, the UE may receive a Physical Broadcast Channel(PBCH) from the eNB and acquire in-cell broadcast information.Meanwhile, the UE receives a Downlink Reference Signal (DL RS) in aninitial cell search step to check a downlink channel status.

A UE that completes the initial cell search receives a Physical DownlinkControl Channel (PDCCH) and a Physical Downlink Control Channel (PDSCH)according to information loaded on the PDCCH to acquire more specificsystem information (S602).

Meanwhile, when there is no radio resource first accessing the eNB orfor signal transmission, the UE may perform a Random Access Procedure(RACH) to the eNB (S603 to S606). To this end, the UE may transmit aspecific sequence to a preamble through a Physical Random Access Channel(PRACH) (S603 and S605) and receive a response message (Random AccessResponse (RAR) message) for the preamble through the PDCCH and acorresponding PDSCH. In the case of a contention based RACH, aContention Resolution Procedure may be additionally performed (S606).

The UE that performs the above procedure may then perform PDCCH/PDSCHreception (S607) and Physical Uplink Shared Channel (PUSCH)/PhysicalUplink Control Channel (PUCCH) transmission (S608) as a generaluplink/downlink signal transmission procedure. In particular, the UE mayreceive Downlink Control Information (DCI) through the PDCCH. Here, theDCI may include control information such as resource allocationinformation for the UE and formats may be differently applied accordingto a use purpose.

Meanwhile, the control information which the UE transmits to the eNBthrough the uplink or the UE receives from the eNB may include adownlink/uplink ACK/NACK signal, a Channel Quality Indicator (CQI), aPrecoding Matrix Index (PMI), a Rank Indicator (RI), and the like. TheUE may transmit the control information such as the CQI/PMI/RI, etc.,through the PUSCH and/or PUCCH.

FIG. 7 is a diagram illustrating an example of an antenna array to whicha method proposed in the present disclosure may be applied.

In FIG. 7, the normalized panel antenna array may be constituted by Mgpanels and Ng panels in a horizontal domain and a vertical domain,respectively.

In this case, one panel is constituted by M columns and N rows,respectively, and an X-pol antenna is assumed in FIG. 7. Therefore, thetotal number of antenna elements may be 2*M*N*Mg*Ng.

Beam Management (BM)

A BM procedure as layer 1 (L1)/layer 2 (L2) procedures for acquiring andmaintaining a set of base station (e.g., gNB, TRP, etc.) and/or terminal(e.g., UE) beams which may be used for downlink (DL) and uplink (UL)transmission/reception may include the following procedures and terms.

-   -   Beam measurement: Operation of measuring characteristics of a        beam forming signal received by the eNB or UE.    -   Beam determination: Operation of selecting a transmit (Tx)        beam/receive (Rx) beam of the eNB or UE by the eNB or UE.    -   Beam sweeping: Operation of covering a spatial region using the        transmit and/or receive beam for a time interval by a        predetermined scheme.    -   Beam report: Operation in which the UE reports information of a        beamformed signal based on beam measurement.

The BM procedure may be divided into (1) a DL BM procedure using asynchronization signal (SS)/physical broadcast channel (PBCH) Block orCSI-RS and (2) a UL BM procedure using a sounding reference signal(SRS).

Further, each BM procedure may include Tx beam sweeping for determiningthe Tx beam and Rx beam sweeping for determining the Rx beam.

Downlink Beam Management (DL BM)

FIG. 8 is a diagram illustrating an example of a beam used for beammanagement.

The DL BM procedure may include (1) transmission of beamformed DLreference signals (RSs) (e.g., CIS-RS or SS Block (SSB)) of the eNB and(2) beam reporting of the UE.

Here, the beam reporting a preferred DL RS identifier (ID)(s) andL1-Reference Signal Received Power (RSRP).

The DL RS ID may be an SSB Resource Indicator (SSBRI) or a CSI-RSResource Indicator (CRI).

As illustrated in FIG. 8, an SSB beam and a CSI-RS beam may be used forthe beam management. A measurement metric is an L1-RSRP for eachresource/block. The SSB may be sued for coarse beam management and theCSI-RS may be sued for fine beam management. The SSB may be used forboth the Tx beam sweeping and the Rx beam sweeping.

The Rx beam sweeping using the SSB may be performed while the UE changesthe Rx beam for the same SSBRI across multiple SSB bursts. Here, one SSburst includes one or more SSBs and one SS burst set includes one ormore SSB bursts.

DL BM using SSB

FIG. 9 is a flowchart showing an example of a downlink beam managementprocedure.

A configuration for beam report using the SSB is performed during aCSI/beam configuration in an RRC connected state (or RRC connectedmode).

-   -   The UE receives from the eNB CSI-ResourceConfig IE including        CSI-SSB-ResourceSetList including SSB resources used for the BM        (S901).

Table 5 shows an example of CSI-ResourceConfig IE and as shown in TableA, a BM configuration using the SSB is not separately defined and theSSB is configured like the CSI-RS resource.

TABLE 5 -- ASN1START -- TAG-CSI-RESOURCECONFIG-START CSI-ResourceConfig::= SEQUENCE {  csi-ResourceConfigId CSI-ResourceConfigId, csi-RS-ResourceSetList CHOICE {   nzp-CSI-RS-SSB SEQUENCE {   nzp-CSI-RS-ResourceSetList  SEQUENCE (SIZE (1..maxNrofNZP-CSI-RS-ResourceSetsPerConfig)) OF NZP-CSI-RS-ResourceSetId OPTIONAL,   csi-SSB-ResourceSetList           SEQUENCE (SIZE (1..maxNrofCSI-SSB-ResourceSetsPerConfig)) OF CSI-SSB-ResourceSetId  OPTIONAL   },  csi-IM-ResourceSetList SEQUENCE (SIZE (1..maxNrofCSI-IM-ResourceSetsPerConfig)) OF CSI-IM-ResourceSetId  },  bwp-Id BWP-Id, resourceType ENUMERATED { aperiodic, semiPersistent, periodic },  ... }-- TAG-CSI-RESOURCECONFIGTOADDMOD-STOP -- ASN1STOP

In Table 5, csi-SSB-ResourceSetList parameter represents a list of SSBresources used for beam management and reporting in one resource set.Here, SSB resource set may be configured as {SSBx1, SSBx2, SSBx3, SSBx4,. . . }. SSB index may be defined as 0 to 63.

-   -   The UE receives from the eNB the SSB resource based on the        CSI-SSB-ResourceSetList (S920).    -   When CSI-RS reportConfig associated with reporting of SSBRI and        L1-RSRP is configured, the UE (beam) reports to the eNB best        SSBRI and L1-RSRP corresponding thereto (S930).

In other words, when reportQuantity of the CSI-RS reportConfig IE isconfigured as ‘ssb-Index-RSRP’, the UE reports to the eNB best SSBRI andL1-RSRP corresponding thereto.

In addition, when the CSI-RS resource is configured in the same OFDMsymbol(s) as SSB (SS/PBCH Block) and ‘QCL-TypeD’ is applicable, the UEmay assume that the CSI-RS and the SSB are quasi co-located from theviewpoint of ‘QCL-TypeD’.

Here, the QCL TypeD may mean that antenna ports are QCL from theviewpoint of a spatial Rx parameter. When the UE receives a plurality ofDL antenna ports having a QCL Type D relationship, the same Rx beam maybe applied. Further, the UE does not expect that the CSI-RS isconfigured in an RE overlapped with the RE of the SSB.

DL BM Using CSI-RS

In respect to a CSI-RS usage, i) when a repetition parameter isconfigured in a specific CSI-RS resource set and TRS_info is notconfigured, the CSI-RS is used for the beam management. ii) When therepetition parameter is not configured and TRS_info is configured, theCSI-RS is used for a tracking reference signal (TRS). iii) When therepetition parameter is not configured and TRS_info is not configured,the CSI-RS is used for CSI acquisition.

The repetition parameter may be configured only for CSI-RS resource setsassociated with CSI-ReportConfig having a report of L1 RSRP or ‘NoReport (or None)’.

When the UE is configured with CSI-ReportConfig in which reportQuantityis configured as ‘cri-RSRP’ or ‘none’ and CSI-ResourceConfig (higherlayer parameter resourcesForChannelMeasurement) for channel measurementincludes not higher layer parameter ‘trs-Info’ butNZP-CSI-RS-ResourceSet in which higher layer parameter ‘repetition’ isconfigured, the UE may be configured only with the same number of port(1-port or 2-port) having higher layer parameter ‘nrofPorts’ for allCSI-RS resources in NZP-CSI-RS-ResourceSet.

When (higher layer parameter) repetition is configured to ‘ON’, (higherlayer parameter) repetition is associated with the Rx beam sweepingprocedure of the UE. In this case, when the UE is configured withNZP-CSI-RS-ResourceSet, the UE may assume that at least one CSI-RSresource in NZP-CSI-RS-ResourceSet is transmitted to the same downlinkspatial domain transmission filter. In other words, at least one CSI-RSresource in NZP-CSI-RS-ResourceSet is transmitted through the same Txbeam. Here, at least one CSI-RS resource in NZP-CSI-RS-ResourceSet maybe transmitted to different OFDM symbols. Further, the UE does notexpect that different periodicities are received at periodicityAndOffsetin all CSI-RS resources in NZP-CSI-RS-Resourceset.

On the contrary, when Repetition is configured to ‘OFF’, the Repetitionis associated with the Tx beam sweeping procedure of the eNB. In thiscase, when repetition is configured to ‘OFF’, the UE does not assumethat at least one CSI-RS resource in NZP-CSI-RS-ResourceSet istransmitted to the same downlink spatial domain transmission filter. Inother words, at least one CSI-RS resource in NZP-CSI-RS-ResourceSet istransmitted through different Tx beams.

FIG. 10 illustrates an example of a downlink beam management procedureusing a Channel State Information-Reference Signal (CSI-RS).

FIG. 10(a) illustrates an Rx beam determination (or refinement)procedure of the UE and FIG. 10(b) illustrates a Tx beam sweepingprocedure of the eNB. Further, FIG. 10(a) illustrates a case where therepetition parameter is configured to ‘ON’ and FIG. 10(b) illustrates acase where the repetition parameter is configured to ‘OFF’.

Referring to FIG. 10(a) and FIG. 11, an Rx beam determination process ofthe UE will be described.

FIG. 11 is a flowchart showing an example of a receive beamdetermination process of a UE.

-   -   The UE receives, from the eNB, NZP CSI-RS resource set IE        including higher layer parameter repetition through RRC        signaling (S1110). Here, the repetition parameter is configured        to ‘ON’.    -   The UE repeatedly receives a resource(s) in CSI-RS resource set        configured as repetition ‘ON’ in different OFDM symbols through        the same Tx beam (or DL spatial domain transmission filter) of        the eNB (S1120).    -   The UE determines the Rx beam thereof (S1130).    -   The UE skips CSI report (S1140). In this case, reportQuantity of        CSI report config may be configured as ‘No report (or None)’.

In other words, the UE may skip the CSI report when repetition ‘ON’ isconfigured.

Referring to FIG. 10(b) and FIG. 12, a Tx beam determination process ofthe eNB will be described.

FIG. 12 is a flowchart showing an example of a transmit beamdetermination process of an eNB.

-   -   The UE receives, from the eNB, NZP CSI-RS resource set IE        including higher layer parameter repetition through RRC        signaling (S1210). Here, the repetition parameter is configured        to ‘OFF’ and associated with the Tx beam sweeping procedure of        the eNB.    -   The UE receives a resource(s) in CSI-RS resource set configured        as repetition ‘OFF’ through different Tx beams (DL spatial        domain transmission filters) of the eNB (S1220).    -   The UE selects (or determines) a best beam (S1230).    -   The UE reports to the eNB an ID for the selected beam and        related quality information (e.g., L1-RSRP) (S1240). In this        case, reportQuantity of CSI report config may be configured as        ‘CRI+L1-RSRP’.

In other words, when the CSI-RS is transmitted for the BM, the UEreports to the eNB the CRI and L1-RSRP therefor.

FIG. 13 illustrates an example of resource allocation in time andfrequency domains associated with a DL BM procedure using the CSI-RS.

Specifically, it can be seen that when repetition ‘ON’ is configured inthe CSI-RS resource set, a plurality of CSI-RS resources is repeatedlyused by applying the same Tx beam and when repetition ‘OFF’ isconfigured in the CSI-RS resource set, different CSI-RS resources aretransmitted by different Tx beams.

DL BM Associated Beam Indication

The UE may be RRC-configured with a list for a maximum of M candidateTransmission Configuration Indication (TCI) states at least for apurpose of Quasi Co-location (QCL) indication. Here, the M may be 64.

Each TCI state may be configured as one RS set. One of DL RS typesincluding SSB, P-CSI RS, SP-CSI RS, A-CSI RS, and the like may be atleast referred to for an ID of each DL RS for a purpose of spatial QCL(QCL Type D) in the RS set.

Initialization/update of the ID of the DL RS(s) in the RS set used forthe purpose of the spatial QCL may be at least performed throughexplicit signaling.

Table 6 shows an example of TCI-State IE.

The TCI-State IE is associated with a quasi co-location (QCL) typecorresponding to one or two DL reference signals (RSs).

TABLE 6 -- ASN1START -- TAG-TCI-STATE-START TCI-State ::= SEQUENCE { tci-StateId  TCI-StateId,  qcl-Type1  QCL-Info,  qcl-Type2  QCL- InfoOPTIONAL, -- Need R  ... } QCL-Info ::= SEQUENCE {  cell   ServCellIndex    OPTIONAL,   -- Need R  bwp-Id   BWP- Id OPTIONAL, -- CondCSI-RS-Indicated  referenceSignal  CHOICE {   csi-rs  NZP-CSI-RS-ResourceId,   ssb    SSB-Index  },  qcl-Type  ENUMERATED{typeA, typeB, typeC, typeD},  ... } -- TAG-TCI-STATE-STOP -- ASN1STOP

In Table 6, bwp-Id parameter represents DL BWP in which the RS islocated, cell parameter represents a carrier in which the RS is located,and reference signal parameter represents a reference antenna port(s)which becomes a source of quasi co-location for a corresponding targetantenna port(s) or a reference signaling including the same. The targetantenna port(s) may be CSI-RS, PDCCH DMRS, or PDSCH DMRS. As an example,corresponding TCI state ID may be indicated for NZP CSI-RS resourceconfiguration information in order to indicate QCL reference RSinformation for NZP CSI-RS. As another example, the TCI state ID may beindicated for each CORESET configuration in order to indicate QCLreference information for a PDCCH DMRS antenna port(s). As yet anotherexample, the TCI state ID may be indicated through DCI in order toindicate QCL reference information for a PDSCH DMRS antenna port(s).

Quasi-Co Location (QCL)

The antenna port is defined so that a channel in which the symbol on theantenna port is transported may be inferred from a channel in whichdifferent symbols on the same antenna port are transported. When aproperty of a channel in which a symbol on one antenna port istransported may be interred from a channel in which symbols on differentantenna ports are transported, two antenna ports may have a quasico-located or quasi co-location (QC/QCL) relationship.

Here, the channel property includes at least one of a delay spread, aDoppler spread, a frequency/Doppler shift, average received power,received timing/average delay, and a spatial Rx parameter. Here, thespatial Rx parameter means a spatial (receive) channel propertyparameter such as angle of arrival.

The US may be configured as a list of up to M TCI-State configurationsin higher layer parameter PDSCH-Config in order to decode the PDSCHaccording to detected PDCCH having an intended DCI for the correspondingUE and a given serving cell. The M depends on a UE capability.

Each TCI-State includes a parameter for configuring a quasi co-locationrelationship between one or two DL reference signals and a DM-RS port ofthe PDSCH.

The quasi co-location relationship is configured as higher layerparameter qcl-Type1 for a first DL RS and qcl-Type2 (when configured)for a second DL RS. Two DL RSs are not the same as each other in termsof QCL type regardless of whether two DL RS are DL RSs having the samereference or DL RSs having different references.

A quasi co-location type corresponding to each DL RS may be given byhigher layer parameter qcl-Type of QCL-Info and may take one of thefollowing values.

-   -   ‘QCL-TypeA’: {Doppler shift, Doppler spread, average delay,        delay spread}    -   ‘QCL-TypeB’: {Doppler shift, Doppler spread}    -   ‘QCL-TypeC’: {Doppler shift, average delay}    -   ‘QCL-TypeD’: {Spatial Rx parameter}

For example, when a target antenna port is specific NZP CSI-RS,corresponding NZP CSI-RS antenna ports may be indicated/configured to beQCL with specific TRS from the viewpoint of QCL-Type A and specific SSBfrom the viewpoint of QCL-Type D. The UE that receives theindication/configuration may receive the corresponding NZP CSI-RS byusing a Doppler delay value measured in QCL-TypeA TRS and apply an Rxbeam used for receiving QCL-TypeD SSB to reception of the correspondingNZP CSI-RS.

The UE may receive an activation command by MAC CE signaling used formapping up to eight TCI states to codepoint of DCI field ‘TransmissionConfiguration Indication’.

UL BM

In the case of UL BM, beam reciprocity (or beam correspondence) betweenthe Tx beam and the Rx beam may be established or not establishedaccording to UE implementation. If the reciprocity between the Tx beamand the Tx beam is established in both the eNB and the UE, a UL beampair may be matched through a DL beam pair. However, when thereciprocity between the Tx beam and the Rx beam is not established evenin any one of the eNB and the UE, a UL beam pair determination processis required apart form DL beam pair determination.

Further, even when the eNB and the UE maintain beam correspondence, theeNB may use a UL BM procedure in order to determine a DL Tx beam withoutrequesting report of a preferred beam by the UE.

The UL BM may be performed through beamformed UL SRS transmission andwhether to apply UL BM of the SRS resource set is configured by a(higher layer parameter) usage. When the usage is configured as‘BeamManagement(BM)’, only one SRS resource may be transmitted to eachof a plurality of SRS resource sets at a given time instant.

The UE may be configured with one or more Sounding Reference Symbol(SRS) resource sets configured by (higher layer parameter)SRS-ResourceSet (through higher layer signaling, RRC signaling, etc.).For each SRS resource set, the UE may be configured with K (≥1) SRSresources (higher later parameter SRS-resources). Here, K is a naturalnumber and a maximum value of K is indicated by SRS_capability.

Similarly to the DL BM, a UL BM procedure may also be divided into Txbeam sweeping of the UE and Rx beam sweeping of the eNB.

FIG. 14 illustrates an example of an uplink beam management procedureusing a Sounding Reference Signal (SRS). FIG. 14(a) illustrates an Rxbeam determination procedure of the eNB and FIG. 14(b) illustrates a Txbeam sweeping procedure of the UE.

FIG. 15 is a flowchart showing an example of an uplink beam managementprocedure using the SRS.

-   -   The UE receives, from the eNB, RRC signaling (e.g., SRS-Config        IE) including a (higher layer parameter) usage parameter        configured as ‘beam management’ (S15010).

Table 7 shows an example of SRS-Config Information Element (IE) andSRS-Config IE is used for an SRS transmission configuration. SRS-ConfigIE includes a list of SRS-Resources and a list of SRS-ResourceSets. EachSRS resource set means a set of SRS-resources.

The network may trigger transmission of the SRS resource set by usingconfigured aperiodicSRS-ResourceTrigger (L1 DCI).

TABLE 7 -- ASN1START -- TAG-MAC-CELL-GROUP-CONFIG-START SRS-Config ::=   SEQUENCE {  srs-ResourceSetToReleaseList     SEQUENCE(SIZE(1..maxNrofSRS-ResourceSets)) OF SRS-ResourceSetId  OPTIONAL, --Need N  srs-ResourceSetToAddModList    SEQUENCE(SIZE(1..maxNrofSRS-ResourceSets)) OF SRS-ResourceSet OPTIONAL, -- NeedN  srs-ResourceToReleaseList     SEQUENCE(SIZE(1..maxNrofSRS-Resources)) OF SRS-ResourceId  OPTIONAL, -- Need N srs-ResourceToAddModList     SEQUENCE (SIZE(1..maxNrofSRS-Resources))OF SRS-Resource  OPTIONAL, -- Need N  tpc-Accumulation     ENUMERATED{disabled}          OPTIONAL, -- Need S  ... } SRS-ResourceSet ::=  SEQUENCE {  srs-ResourceSetId     SRS-ResourceSetId, srs-ResourceIdList     SEQUENCE (SIZE(1..maxNrofSRS- ResourcesPerSet))OF SRS-ResourceId    OPTIONAL, -- Cond Setup  resourceType     CHOICE {  aperiodic      SEQUENCE {    aperiodicSRS-ResourceTrigger       INTEGER (1..maxNrofSRS- TriggerStates-1),    csi-RS       NZP-CSI-RS- ResourceId        OPTIONAL, -- Cond NonCodebook   slotOffset        INTEGER (1..32)         OPTIONAL, -- Need S    ...  },   semi-persistent      SEQUENCE {    associatedCSI-RS       NZP-CSI-RS- ResourceId        OPTIONAL, -- Cond NonCodebook ...  },   periodic      SEQUENCE {    associatedCSI-RS        NZP-CSI-RS-ResourceId        OPTIONAL, -- Cond NonCodebook    ...   }  }, usage                   ENUMERATED {beamManagement, codebook,nonCodebook, antennaSwitching},  alpha      Alpha   OPTIONAL, -- Need S p0      INTEGER (− 202..24)          OPTIONAL, -- Cond Setup pathlossReferenceRS     CHOICE {   ssb-Index      SSB-Index,  csi-RS-Index      NZP-CSI-RS-ResourceId SRS-SpatialRelationInfo ::= SEQUENCE {  servingCellId    ServCellIndex  OPTIONAL, -- Need S referenceSignal   CHOICE {   ssb-Index     SSB-Index,   csi-RS-Index    NZP-CSI-RS-ResourceId,   srs      SEQUENCE {    resourceId      SRS-ResourceId,    uplinkBWP       BWP-Id   }  } } SRS-ResourceId::=    INTEGER (0..maxNrofSRS-Resources-1)

In Table 7, usage represents a higher layer parameter indicating whetherthe SRS resource set is used for the beam management or whether the SRSresource set is used for codebook based or non-codebook basedtransmission. The usage parameter corresponds to L1 parameter‘SRS-SetUse’. ‘spatialRelationInfo’ is a parameter representing aconfiguration of a spatial relation between a reference RS and a targetSRS. Here, the reference RS may become SSB, CSI-RS, or SRS correspondingto L1 parameter ‘SRS-SpatialRelationInfo’. The usage is configured foreach SRS resource set.

-   -   The UE determines a Tx beam for an SRS resource to be        transmitted based on SRS-SpatialRelation Info included in the        SRS-Config IE (S1520). Here, SRS-SpatialRelation Info is        configured for each SRS resource and represents a beam which is        the same as the beam used in the SSB, the CSI-RS, or the SRS is        to be applied for each SRS resource. Further,        SRS-SpatialRelationInfo may be configured or not configured in        each SRS resource.    -   If SRS-SpatialRelationInfo is configured in the SRS resource,        SRS-SpatialRelationInfo is transmitted by applying the beam        which is the same as the beam used in the SSB, the CSI-RS, or        the SRS. However, if SRS-SpatialRelationInfo is not configured        in the SRS resource, the UE arbitrarily determines the Tx beam        and transmits the SRS through the determined Tx beam (S1530).

More specifically, for P-SRS in which ‘SRS-ResourceConfigType’ isconfigured as ‘periodic’:

i) When SRS-SpatialRelationInfo is configured as ‘SSB/PBCH’, the UEtransmits the corresponding SRS resource by applying a spatial domaintransmission filter which is the same as a spatial domain Rx filter usedfor receiving the SSB/PBCH (or generated from the corresponding filter);or

ii) When SRS-SpatialRelationInfo is configured as CSI-RS′, the UEtransmits the SRS resource by applying the same spatial domaintransmission filter used for receiving periodic CSI-RS or SP CSI-RS; or

iii) When SRS-SpatialRelationInfo is configured as ‘SRS’, the UEtransmits the SRS resource by applying the same spatial domaintransmission filter used for transmitting the periodic CSI-RS.

Even when ‘SRS-ResourceConfigType’ is configured as ‘SP-SRS’ or‘AP-SRS’, beam determination and transmission operations may be appliedsimilarly thereto.

-   -   Additionally, the UE may receive or not receive a feedback for        the SRS from the eNB like three following cases (S1540).

i) When Spatial_Relation_Info is configured for all SRS resources in theSRS resource set, the UE transmits the SRS with the beam indicated bythe eNB. For example, when all Spatial_Relation_Info indicates the sameSSB, CRI, or SRI, the UE repeatedly transmits the SRS with the samebeam. This case as a usage of selecting the Rx beam by the eNBcorresponds to FIG. 14(a).

ii) Spatial_Relation_Info may not be configured for all SRS resources inthe SRS resource set. In this case, the UE may transmit the SRS whilearbitrarily changing the SRS beam. In other words, this case as a usageof selecting the Tx beam by the UE corresponds to FIG. 16(b).

iii) Spatial_Relation_Info may be configured for some SRS resources inthe SRS resource set. In this case, the SRS may be transmitted with thebeam configured for the configured SRS resource and the UE mayarbitrarily transmit the SRS by applying the Tx beam to an SRS resourcein which Spatial_Relation_Info is not configured.

Channel State Information (CSI) Related Procedure

FIG. 16 is a flowchart showing an example of a CSI associated procedureto which a method proposed in the present disclosure may be applied.

In a New Radio (NR) system, a channel state information-reference signal(CSI-RS) is used for time and/or frequency tracking, CSI computation,layer 1 (L1)-reference signal received power (RSRP) computation, andmobility.

The expression of ‘A and/or B’ used in the present disclosure may beconstrued as the same meaning as ‘including at least one of A and B’.

The CSI computation is related to CSI acquisition and L1-RSRPcomputation is related to beam management (BM).

Channel state information (CSI) collectively refers to information thatmay indicate the quality of a radio channel (or referred to as a link)formed between the UE and the antenna port.

In order to perform one of usages of the CSI-RS, a terminal (e.g., userequipment (UE)) receives, from a base station (e.g., general Node B orgNB), configuration information related to the CSI through radioresource control (RRC) signaling (S1610).

The configuration information related to the CSI may include at leastone of CSI-interference management (IM) resource related information,CSI measurement configuration related information, CSI resourceconfiguration related information, CSI-RS resource related information,or CSI report configuration related information.

The CSI-IM resource related information may include CSI-IM resourceinformation, CSI-IM resource set information, and the like.

The CSI-IM resource set is identified by a CSI-IM resource setidentifier (ID) and one resource set includes at least one CSI-IMresource.

Each CSI-IM resource is identified by a CSI-IM resource ID.

The CSI resource configuration related information defines a groupincluding at least one of a non zero power (NZP) CSI-RS resource set, aCSI-IM resource set, or a CSI-SSB resource set.

In other words, the CSI resource configuration related information mayinclude a CSI-RS resource set list and the CSI-RS resource set list mayinclude at least one of a NZP CSI-RS resource set list, a CSI-IMresource set list, or a CSI-SSB resource set list.

The CSI resource configuration related information may be expressed asCSI-ResourceConfig IE.

The CSI-RS resource set is identified by a CSI-RS resource set ID andone resource set includes at least one CSI-RS resource.

Each CSI-RS resource is identified by a CSI-RS resource ID.

As shown in Table 8, parameters (e.g., a BM related ‘repetition’parameter and a tracking related ‘trs-Info’ parameter) representing theusage may be configured for each NZP CSI-RS resource set.

Table 8 shows an example of NZP CSI-RS resource set IE.

TABLE 8 -- ASN1START -- TAG-NZP-CSI-RS-RESOURCESET-STARTNZP-CSI-RS-ResourceSet ::= SEQUENCE {  nzp-CSI-ResourceSetIdNZP-CSI-RS-ResourceSetId,  nzp-CSI-RS-Resources SEQUENCE (SIZE(1..maxNrofNZP-CSI-RS- ResourcesPerSet)) OF NZP-CSI-RS-ResourceId, repetition ENUMERATED { on, off }  OPTIONAL,  aperiodicTriggeringOffsetINTEGER(0..4) OPTIONAL, -- Need S  trs-Info ENUMERATED {true}  OPTIONAL, -- Need R  ... } -- TAG-NZP-CSI-RS-RESOURCESET-STOP --ASN1STOP

In Table 8, repetition parameter as a parameter representing whether thesame beam is repeatedly transmitted indicates whether the repetition is‘ON’ or ‘OFF’ for each NZP CSI-RS resource set.

The Tx beam used in the present disclosure may be construed as the samemeaning as the spatial domain transmission filter and the Rx beam may beconstrued as the same meaning as the spatial domain reception filter.

For example, when the repetition parameter of Table 8 is configured to‘OFF’, the UE does not assume that the NZP CSI-RS resource(s) in theresource set are transmitted with the same spatial domain transmissionfilter and the same Nrofports in all symbols.

In addition, the repetition parameter corresponding to the higher layerparameter corresponds to ‘CSI-RS-ResourceRep’ of L1 parameter.

The CSI report configuration related information includes areportConfigType parameter representing a time domain behavior and areportQuantity parameter representing a CSI related quantity forreporting.

The time domain behavior may be periodic, aperiodic, or semi-persistent.

In addition, the CSI report configuration related information may beexpressed as CSI-ReportConfig IE and Table 9 below shows an example ofCSI-ReportConfig IE.

TABLE 9 -- ASN1START -- TAG-CSI-RESOURCECONFIG-START CSI-ReportConfig::= SEQUENCE {  reportConfigId  CSI-ReportConfigId,  carrier ServCellIndex OPTIONAL, - - Need S  resourcesForChannelMeasurement CSI-ResourceConfigId,  csi-IM-ResourcesForInterferenceCSI-ResourceConfigId OPTIONAL, -- Need R nzp-CSI-RS-ResourcesForInterference  CSI-ResourceConfigId OPTIONAL, --Need R  reportConfigType CHOICE {   periodic  SEQUENCE {   reportSlotConfig   CSI-ReportPeriodicityAndOffset,   pucch-CSI-ResourceList    SEQUENCE (SIZE (1..maxNrofBWPs)) OFPUCCH-CSI-Resource   },   semiPersistentOnPUCCH   SEQUENCE {   reportSlotConfig   CSI-ReportPeriodicityAndOffset,   pucch-CSI-ResourceList    SEQUENCE (SIZE (1..maxNrofBWPs)) OFPUCCH-CSI-Resource   },   semiPersistentOnPUSCH   SEQUENCE {   reportSlotConfig   ENUMERATED {sl5, sl10, sl20, sl40, sl80, sl160,sl320},    reportSlotOffsetList  SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OF INTEGER(0..32),    p0alpha   P0-PUSCH-AlphaSetId   },   aperiodic  SEQUENCE {   reportSlotOffsetList  SEQUENCE (SIZE (1..maxNrofUL-Allocations)) OFINTEGER(0..32)   }  },  reportQuantity  CHOICE {   none   NULL,  cri-RI-PMI-CQI   NULL,   cri-RI-i1  NULL,   cri-RI-i1-CQI  SEQUENCE {   pdsch-BundleSizeForCSI    ENUMERATED {n2, n4}  OPTIONAL   },  cri-RI-CQI   NULL,   cri-RSRP  NULL,   ssb-Index-RSRP   NULL,  cri-RI-LI-PMI-CQI   NULL  },

In addition, the UE measures CSI based on configuration informationrelated to the CSI (S1620).

The CSI measurement may include (1) a CSI-RS reception process (S1622)and (2) a process of computing the CSI through the received CSI-RS(S1624).

A sequence for the CSI-RS is generated by Equation 3 below and aninitialization value of pseudo-random sequence C(i) is defined byEquation 4.

$\begin{matrix}{\mspace{79mu}{{r(m)} = {{\frac{1}{\sqrt{2}}\left( {1 - {2 \cdot {c\left( {2m} \right)}}} \right)} + {j\frac{1}{\sqrt{2}}\left( {1 - {2 \cdot {c\left( {{2m} + 1} \right)}}} \right)}}}} & \left\lbrack {{Equation}\mspace{14mu} 3} \right\rbrack \\{c_{init} = {\left( {{2^{10}\left( {{N_{symb}^{slot}n_{s,f}^{\mu}} + l + 1} \right)\left( {{2n_{ID}} + 1} \right)} + n_{ID}} \right){mod}\; 2^{31}}} & \left\lbrack {{Equation}\mspace{14mu} 4} \right\rbrack\end{matrix}$

In Equations 3 and 4, n_(i,i) ^(μ) represents a slot number in a radioframe and pseudo-random sequence generator is initialized to Cant at astart of each OFDM symbol which is n_(i,i) ^(μ).

In addition, l represents an OFDM symbol number in a slot and n_(ID) isthe same as higher-layer parameter scramblingID.

In addition, for the CSI-RS, resource element (RE) mapping is configuredtime and frequency domains by higher layer parameterCSI-RS-ResourceMapping.

Table 10 shows an example of CSI-RS-ResourceMapping IE.

TABLE 10 -- ASN1START -- TAG-CSI-RS-RESOURCEMAPPING-STARTCSI-RS-ResourceMapping ::= SEQUENCE {  frequencyDomainAllocation CHOICE{   row1   BIT STRING (SIZE (4)),   row2   BIT STRING (SIZE (12)),  row4   BIT STRING (SIZE (3)),   other   BIT STRING (SIZE (6))  }, nrofPorts ENUMERATED {p1,p2,p4,p8,p12,p16,p24,p32}, firstOFDMSymbolInTimeDomain   INTEGER (0..13), firstOFDMSymbolInTimeDomain2  INTEGER (2..12) OPTIONAL, -- Need R cdm-Type  ENUMERATED {noCDM, fd-CDM2, cdm4-FD2-TD2, cdm8-FD2-TD4}, density  CHOICE {   dot5  ENUMERATED {evenPRBs, oddPRBs},   one   NULL,  three   NULL,   spare   NULL  },  freqBand CSI-FrequencyOccupation, ... }

In Table 10, a density (D) represents a density of the CSI-RS resourcemeasured in RE/port/physical resource block (PRB) and nrofPortsrepresents the number of antenna ports.

Further, the UE reports the measured CSI to the eNB (S12030).

Here, in the case where a quantity of CSI-ReportConfig of Table 10 isconfigured to ‘none (or No report)’, the UE may skip the report.

However, even in the case where the quantity is configured to ‘none (orNo report)’, the UE may report the measured CSI to the eNB.

The case where the quantity is configured to ‘none (or No report)’ is acase of triggering aperiodic TRS or a case where repetition isconfigured.

Here, only in a case where the repetition is configured to ‘ON’, the UEmay be defined to skip the report.

In summary, in the case where the repetition is configured to ‘ON’ and‘OFF’, ‘No report’, SSB Resource Indicator (SSBRI) and L1-RSRP′, and‘CSI-RS Resource Indicator (CRI) and L1-RSRP’ may be all available asthe CSI report.

Alternatively, in the case where the repetition is ‘OFF’, CSI report of‘SSBRI and L1-RSRP’ or ‘CRI and L1-RSRP’ may be defined to betransmitted and in the case where the repetition is ‘ON’, ‘No report’,‘SSBRI and L1-RSRP’, or ‘CRI and L1-RSRP’ may be defined to betransmitted.

CSI Measurement and Reporting Procedure

The NR system supports more flexible and dynamic CSI measurement andreporting.

The CSI measurement may include a procedure of acquiring the CSI byreceiving the CSI-RS and computing the received CSI-RS.

As time domain behaviors of the CSI measurement and reporting,aperiodic/semi-persistent/periodic channel measurement (CM) andinterference measurement (IM) are supported.

A 4 port NZP CSI-RS RE pattern is used for configuring the CSI-IM.

CSI-IM based IMR of the NR has a similar design to the CSI-IM of the LTEand is configured independently of ZP CSI-RS resources for PDSCH ratematching.

In addition, in ZP CSI-RS based IMR, each port emulates an interferencelayer having (a preferable channel and) precoded NZP CSI-RS.

This is for intra-cell interference measurement with respect to amulti-user case and primarily targets MU interference.

The eNB transmits the precoded NZP CSI-RS to the UE on each port of theconfigured NZP CSI-RS based IMR.

The UE assumes a channel/interference layer for each port and measuresinterference.

In respect to the channel, when there is no PMI and RI feedback,multiple resources are configured in a set and the base station or thenetwork indicates a subset of NZP CSI-RS resources through the DCI withrespect to channel/interference measurement.

Resource setting and resource setting configuration will be described inmore detail.

Resource Setting

Each CSI resource setting ‘CSI-ResourceConfig’ includes a configurationfor S≥1 CSI resource set (given by higher layer parametercsi-RS-ResourceSetList).

Here, the CSI resource setting corresponds to theCSI-RS-resourcesetlist.

Here, S represents the number of configured CSI-RS resource sets.

Here, the configuration for S≥1 CSI resource set includes each CSIresource set including CSI-RS resources (constituted by NZP CSI-RS orCSI IM) and an SS/PBCH block (SSB) resource used for L1-RSRPcomputation.

Each CSI resource setting is positioned in a DL BWP (bandwidth part)identified by a higher layer parameter bwp-id.

In addition, all CSI resource settings linked to CSI reporting settinghave the same DL BWP.

A time domain behavior of the CSI-RS resource within the CSI resourcesetting included in CSI-ResourceConfig IE is indicated by higher layerparameter resourceType and may be configured to be aperiodic, periodic,or semi-persistent.

The number S of configured CSI-RS resource sets is limited to ‘1’ withrespect to periodic and semi-persistent CSI resource settings.

Periodicity and slot offset which are configured are given in numerologyof associated DL BWP as given by bwp-id with respect to the periodic andsemi-persistent CSI resource settings.

When the UE is configured as multiple CSI-ResourceConfigs including thesame NZP CSI-RS resource ID, the same time domain behavior is configuredwith respect to CSI-ResourceConfig.

When the UE is configured as multiple CSI-ResourceConfigs including thesame CSI-IM resource ID, the same time domain behavior is configuredwith respect to CSI-ResourceConfig.

Next, one or more CSI resource settings for channel measurement (CM) andinterference measurement (IM) are configured through higher layersignaling.

-   -   CSI-IM resource for interference measurement.    -   NZP CSI-RS resource for interference measurement.    -   NZP CSI-RS resource for channel measurement.

That is, channel measurement resource (CMR) may be NZP CSI-RS andinterference measurement resource (IMR) may be NZP CSI-RS for CSI-IM andIM.

Here, CSI-IM (or ZP CSI-RS for IM) is primarily used for inter-cellinterference measurement.

In addition, NZP CSI-RS for IM is primarily used for intra-cellinterference measurement from multi-users.

The UE may assume CSI-RS resource(s) for channel measurement andCSI-IM/NZP CSI-RS resource(s) for interference measurement configuredfor one CSI reporting are ‘QCL-TypeD’ for each resource.

Resource Setting Configuration

As described, the resource setting may mean a resource set list.

In each trigger state configured by using higher layer parameterCSI-AperiodicTriggerState with respect to aperiodic CSI, eachCSI-ReportConfig is associated with one or multiple CSI-ReportConfigslinked to the periodic, semi-persistent, or aperiodic resource setting.

One reporting setting may be connected with a maximum of three resourcesettings.

-   -   When one resource setting is configured, the resource setting        (given by higher layer parameter resourcesForChannelMeasurement)        is used for channel measurement for L1-RSRP computation.    -   When two resource settings are configured, a first resource        setting (given by higher layer parameter        resourcesForChannelMeasurement) is used for channel measurement        and a second resource setting (given by        csi-IM-ResourcesForInterference or        nzp-CSI-RS-ResourcesForInterference) is used for interference        measurement performed on CSI-IM or NZP CSI-RS.    -   When three resource settings are configured, a first resource        setting (given by resourcesForChannelMeasurement) is for channel        measurement, a second resource setting (given by        csi-IM-ResourcesForInterference) is for CSI-IM based        interference measurement, and a third resource setting (given by        nzp-CSI-RS-ResourcesForInterference) is for NZP CSI-RS based        interference measurement.

Each CSI-ReportConfig is linked to periodic or semi-persistent resourcesetting with respect to semi-persistent or periodic CSI.

-   -   When one resource setting (given by        resourcesForChannelMeasurement) is configured, the resource        setting is used for channel measurement for L1-RSRP computation.    -   When two resource settings are configured, a first resource        setting (given by resourcesForChannelMeasurement) is used for        channel measurement and a second resource setting (given by        higher layer parameter csi-IM-ResourcesForInterference) is used        for interference measurement performed on CSI-IM.

CSI measurement related CSI computation will be described.

When interference measurement is performed on CSI-IM, each CSI-RSresource for channel measurement is associated with the CSI-IM resourcefor each resource by an order of CSI-RS resources and CSI-IM resourceswithin a corresponding resource set.

The number of CSI-RS resources for channel measurement is equal to thenumber of CSI-IM resources.

In addition, when the interference measurement is performed in the NZPCSI-RS, the UE does not expect to be configured as one or more NZPCSI-RS resources in the associated resource set within the resourcesetting for channel measurement.

A UE in which Higher layer parameter nzp-CSI-RS-ResourcesForInterferenceis configured does not expect that 18 or more NZP CSI-RS ports will beconfigured in the NZP CSI-RS resource set.

For CSI measurement, the UE assumes the followings.

-   -   Each NZP CSI-RS port configured for interference measurement        corresponds to an interference transport layer.    -   In all interference transport layers of the NZP CSI-RS port for        interference measurement, an energy per resource element (EPRE)        ratio is considered.    -   Different interference signals on RE(s) of the NZP CSI-RS        resource for channel measurement, the NZP CSI-RS resource for        interference measurement, or CSI-IM resource for interference        measurement.

A CSI reporting procedure will be described in more detail.

For CSI reporting, time and frequency resources which may be used by theUE are controlled by the eNB.

The channel state information (CSI) may include at least one of achannel quality indicator (CQI), a precoding matrix indicator (PMI), aCSI-RS resource indicator (CRI), an SS/PBCH block resource indicator(SSBRI), a layer indicator (LI), a rank indicator (RI), and L1-RSRP.

For the CQI, PMI, CRI, SSBRI, LI, RI, and L1-RSRP, the UE is configuredby a higher layer as N≥1 CSI-ReportConfig reporting setting, M≥1CSI-ResourceConfig resource setting, and a list (provided byaperiodicTriggerStateList and semiPersistentOnPUSCH) of one or twotrigger states.

In the aperiodicTriggerStateList, each trigger state includes thechannel and an associated CSI-Reportconfigs list optionally indicatingresource set IDs for interference.

In the semiPersistentOnPUSCH-TriggerStateList, each trigger stateincludes one associated CSI-ReportConfig.

In addition, the time domain behavior of CSI reporting supportsperiodic, semi-persistent, and aperiodic.

Hereinafter, each of periodic, semi-persistent (SP), and aperiodic CSIreporting will be described.

The periodic CSI reporting is performed on short PUCCH and long PUCCH.

The periodicity and slot offset of the periodic CSI reporting may beconfigured through RRC and refer to the CSI-ReportConfig IE.

Next, SP CSI reporting is performed on short PUCCH, long PUCCH, orPUSCH.

In the case of SP CSI on the short/long PUCCH, the periodicity and theslot offset are configured as the RRC and the CSI reporting to separateMAC CE is activated/deactivated.

In the case of the SP CSI on the PUSCH, the periodicity of the SP CSIreporting is configured through the RRC, but the slot offset is notconfigured through the RRC and the SP CSI reporting isactivated/deactivated by DCI (format 0_1).

An initial CSI reporting timing follows a PUSCH time domain allocationvalue indicated in the DCI and a subsequent CSI reporting timing followsa periodicity configured through the RRC.

Separated RNTI (SP-CSI C-RNTI) is used with respect to the SP CSIreporting on the PUSCH.

DCI format 0_1 may include a CSI request field and mayactivate/deactivate a specific configured SP-CSI trigger state.

In addition, the SP CSI reporting has the same or similaractivation/deactivation as a mechanism having data transmission on SPSPUSCH.

Next, the aperiodic CSI reporting is performed on the PUSCH and istriggered by the DCI.

In the case of AP CSI having AP CSI-RS, an AP CSI-RS timing isconfigured by the RRC.

Here, a timing for the AP CSI reporting is dynamically controlled by theDCI.

The NR does not adopt a scheme (for example, transmitting RI, WBPMI/CQI, and SB PMI/CQI in order) of dividing and reporting the CSI inmultiple reporting instances applied to PUCCH based CSI reporting in theLTE.

Instead, the NR restricts specific CSI reporting not to be configured inthe short/long PUCCH and a CSI omission rule is defined.

In addition, in relation with the AP CSI reporting timing, a PUSCHsymbol/slot location is dynamically indicated by the DCI. In addition,candidate slot offsets are configured by the RRC.

For the CSI reporting, slot offset(Y) is configured for each reportingsetting.

For UL-SCH, slot offset K2 is configured separately.

Two CSI latency classes (low latency class and high latency class) aredefined in terms of CSI computation complexity.

The low latency CSI is a WB CSI that includes up to 4 ports Type-Icodebook or up to 4-ports non-PMI feedback CSI.

The high latency CSI refers to CSI other than the low latency CSI.

For a normal UE, (Z, Z′) is defined in a unit of OFDM symbols.

Z represents a minimum CSI processing time from the reception of theaperiodic CSI triggering DCI to the execution of the CSI reporting.

Z′ represents a minimum CSI processing time from the reception of theCSI-RS for channel/interference to the execution of the CSI reporting.

Additionally, the UE reports the number of CSIs which may besimultaneously calculated.

FIG. 17 is a flowchart showing an example of a downlinktransmission/reception operation to which a method proposed in thepresent disclosure may be applied.

-   -   The eNB schedules downlink transmission such as a frequency/time        resource, a transport layer, a donwlink precoder, MCS, etc.,        (S1710). In particular, the eNB may determine a beam for PDSCH        transmission to the UE through the aforementioned operations.    -   The UE receives Downlink Control Information (DCI) for downlink        scheduling (i.e., including scheduling information of the PDSCH)        on the PDCCH (S1720).

DCI format 1_0 or 1_1 may be used for the downlink scheduling and inparticular, DCI format 1_1 includes the following information whichincludes: Identifier for DCI formats, Bandwidth part indicator,Frequency domain resource assignment, Time domain resource assignment,PRB bundling size indicator, Rate matching indicator, ZP CSI-RS trigger,Antenna port(s), Transmission configuration indication (TCI), SRSrequest, and Demodulation Reference Signal (DMRS) sequenceinitialization.

In particular, according to each state indicated in an antenna port(s)field, the number of DMRS ports may be scheduled and Single-user(SU)/Multi-user (MU) transmission scheduling is also available.

Further, a TCI field is configured by 3 bits and a maximum of 8 TCIstates are indicated according to a TCI field value to dynamically theQCL for the DMRS.

-   -   The UE receives downlink data from the eNB on the PDSCH (S1730).

When the UE detects a PDCCH including DCI format 1_0 or 1_1, the UEdecodes the PDSCH according to the indication by the corresponding DCI.

Here, when the UE receives a PDSCH scheduled by DCI format 1, a DMRSconfiguration type may be configured by higher layer parameter‘dmrs-Type’ in the UE and the DMRS type is used for receiving the PDSCH.Further, in the UE, the maximum number of front-loaded DMRS symbols forthe PDSCH may be configured by higher layer parameter ‘maxLength’.

In the case of DMRS configuration type 1, when a single codeword isscheduled and an antenna port mapped to an index of {2, 9, 10, 11, or30} is designated in the UE or when two codewords are scheduled in theUE, the UE assumes that all remaining orthogonal antenna ports are notassociated with PDSCH transmission to another UE.

Alternatively, in the case of DMRS configuration type 2, when a singlecodeword is scheduled and an antenna port mapped to an index of {2, 10,or 23} is designated in the UE or when two codewords are scheduled inthe UE, the UE assumes that all remaining orthogonal antenna ports arenot associated with PDSCH transmission to another UE.

When the UE receives the PDSCH, a precoding granularity P′ may beassumed as a consecutive resource block in the frequency domain. Here,P′ may correspond to one value of {2, 4, and wideband}.

When P′ is determined as wideband, the UE does not predict that thePDSCH is scheduled to non-contiguous PRBs and the UE may assume that thesame precoding is applied to the allocated resource.

On the contrary, when P′ is determined as any one of {2 and 4}, aPrecoding Resource Block Group (PRG) is split into P′ consecutive PRBs.The number of actually consecutive PRBs in each PRG may be one or more.The UE may assume that the same precoding is applied to consecutivedownlink PRBs in the PRG.

In order to determine a modulation order in the PDSCH, a target coderate, and a transport block size, the UE first reads a 5-bit MCD fieldin the DCI and determines the modulation order and the target code rate.In addition, the UE reads a redundancy version field in the DCI anddetermines a redundancy version. In addition, the UE determines thetransport block size by using the number of layers before rate matchingand the total number of allocated PRBs.

FIG. 18 is a flowchart showing an example of an uplinktransmission/reception operation to which a method proposed in thepresent disclosure may be applied.

The eNB schedules uplink transmission such as the frequency/timeresource, the transport layer, an uplink precoder, the MCS, etc.,(S1810). In particular, the eNB may determine a beam for PUSCHtransmission of the UE through the aforementioned operations.

The UE receives DCI for downlink scheduling (i.e., including schedulinginformation of the PUSCH) on the PDCCH (S1820).

DCI format 0_0 or 0_1 may be used for the uplink scheduling and inparticular, DCI format 0_1 includes the following information:Identifier for DCI formats), UL/Supplementary uplink (SUL) indicator,Bandwidth part indicator, Frequency domain resource assignment, Timedomain resource assignment, Frequency hopping flag, Modulation andcoding scheme (MCS), SRS resource indicator (SRI), Precoding informationand number of layers, Antenna port(s), SRS request, DMRS sequenceinitialization, and Uplink Shared Channel (UL-SCH) indicator

In particular, configured SRS resources in an SRS resource setassociated with higher layer parameter ‘usage’ may be indicated by anSRS resource indicator field. Further, ‘spatialRelationInfo’ may beconfigured for each SRS resource and a value of ‘spatialRelationInfo’may be one of {CRI, SSB, and SRI}.

The UE transmits the uplink data to the eNB on the PUSCH (S1830).

When the UE detects a PDCCH including DCI format 0_0 or 0_1, the UEtransmits the corresponding PUSCH according to the indication by thecorresponding DCI.

Two transmission schemes, i.e., codebook based transmission andnon-codebook based transmission are supported for PUSCH transmission:

i) When higher layer parameter txConfig′ is set to ‘codebook’, the UE isconfigured to the codebook based transmission. On the contrary, whenhigher layer parameter txConfig′ is set to ‘nonCodebook’, the UE isconfigured to the non-codebook based transmission. When higher layerparameter ‘txConfig’ is not configured, the UE does not predict that thePUSCH is scheduled by DCI format 0_1. When the PUSCH is scheduled by DCIformat 0_0, the PUSCH transmission is based on a single antenna port.

In the case of the codebook based transmission, the PUSCH may bescheduled by DCI format 0_0, DCI format 0_1, or semi-statically. Whenthe PUSCH is scheduled by DCI format 0_1, the UE determines a PUSCHtransmission precoder based on the SRI, the Transmit Precoding MatrixIndicator (TPMI), and the transmission rank from the DCI as given by theSRS resource indicator and the Precoding information and number oflayers field. The TPMI is used for indicating a precoder to be appliedover the antenna port and when multiple SRS resources are configured,the TPMI corresponds to the SRS resource selected by the SRI.Alternatively, when the single SRS resource is configured, the TPMI isused for indicating the precoder to be applied over the antenna port andcorresponds to the corresponding single SRS resource. A transmissionprecoder is selected from an uplink codebook having the same antennaport number as higher layer parameter ‘nrofSRS-Ports’. When the UE isset to higher layer parameter ‘txConfig’ set to ‘codebook’, at least oneSRS resource is configured in the UE. An SRI indicated in slot n isassociated with most recent transmission of the SRS resource identifiedby the SRI and here, the SRS resource precedes PDCCH (i.e., slot n)carrying the SRI.

ii) In the case of the non-codebook based transmission, the PUSCH may bescheduled by DCI format 0_0, DCI format 0_1, or semi-statically. Whenmultiple SRS resources are configured, the UE may determine the PUSCHprecoder and the transmission rank based on a wideband SRI and here, theSRI is given by the SRS resource indicator in the DCI or given by higherlayer parameter ‘srs-ResourceIndicator’. The UE may use one or multipleSRS resources for SRS transmission and here, the number of SRS resourcesmay be configured for simultaneous transmission in the same RB based onthe UE capability. Only one SRS port is configured for each SRSresource. Only one SRS resource may be configured to higher layerparameter ‘usage’ set to ‘nonCodebook’. The maximum number of SRSresources which may be configured for non-codebook based uplinktransmission is 4. The SRI indicated in slot n is associated with mostrecent transmission of the SRS resource identified by the SRI and here,the SRS transmission precedes PDCCH (i.e., slot n) carrying the SRI.

Precoding

Block vectors [y⁽⁰⁾(i) . . . y^((ν-1))(i)]^(T), i=0, 1, . . . , M_(symb)^(layer)−1 may be precoded according to Equation 5 below.

$\begin{matrix}{\begin{bmatrix}{z^{(p_{0})}(i)} \\\vdots \\{z^{(p_{\rho - 1})}(i)}\end{bmatrix} = {W\begin{bmatrix}{y^{(0)}(i)} \\\vdots \\{y^{({\upsilon - 1})}(i)}\end{bmatrix}}} & \left\lbrack {{Equation}\mspace{14mu} 5} \right\rbrack\end{matrix}$

In Equation 5, i=0, 1, . . . , M_(symb) ^(ap)−1, M_(symb) ^(ap)=M_(symb)^(layer). A set {p₀, . . . , p_(ρ-1)} of antenna ports may be determinedaccording to a procedure related to the PUSCH.

In the non-codebook based transmission, precoding matrix W is the sameas an identity matrix. In the codebook based transmission, precodingmatrix W may be given by W=1 for single layer transmission in a singleantenna port, otherwise, precoding matrix W may be given by Tables 11 to17 or a procedure related to the PUSCH for the transmit precoding matrixindicator (TPMI) acquired from the DCI for scheduling the uplinktransmission.

When higher layer parameter txConfig is not configured, precoding matrixW may be 1.

Table 11 below shows an example of precoding matrix for single layertransmission using two antenna ports.

TABLE 11 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-5 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\0\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}0 \\1\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\1\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\{- 1}\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\j\end{bmatrix}$ $\frac{1}{\sqrt{2}}\begin{bmatrix}1 \\{- j}\end{bmatrix}$ — —

Table 12 below shows an example of precoding matrix for single layertransmission using four antenna ports in which transform precoding isactivated.

TABLE 12 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-7 $\frac{1}{2}\begin{bmatrix}1 \\0 \\0 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\0 \\1 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\0 \\0 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\1 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\{- 1} \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\j \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\{- j} \\0\end{bmatrix}$  8-15 $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\1 \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\j \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\{- 1} \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\{- j} \\{- j}\end{bmatrix}$ 16-23 $\frac{1}{2}\begin{bmatrix}1 \\j \\1 \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\j \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\{- 1} \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\{- j} \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\1 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\j \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\{- 1} \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\{- j} \\j\end{bmatrix}$ 24-27 $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\1 \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\j \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\{- 1} \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\{- j} \\1\end{bmatrix}$ — — — —

Table 13 below shows an example of precoding matrix for single layertransmission using four antenna ports in which transform precoding isdeactivated.

TABLE 13 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-7 $\frac{1}{2}\begin{bmatrix}1 \\0 \\0 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\0 \\1 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\0 \\0 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\1 \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\{- 1} \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\j \\0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\0 \\{- j} \\0\end{bmatrix}$  8-15 $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 \\1 \\0 \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\1 \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\j \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\{- 1} \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\1 \\{- j} \\{- j}\end{bmatrix}$ 16-23 $\frac{1}{2}\begin{bmatrix}1 \\j \\1 \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\j \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\{- 1} \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\j \\{- j} \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\1 \\{- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\j \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\{- 1} \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- 1} \\{- j} \\j\end{bmatrix}$ 24-27 $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\1 \\{- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\j \\1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\{- 1} \\j\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 \\{- j} \\{- j} \\{- 1}\end{bmatrix}$ — — — —

Table 14 below shows an example of precoding matrix for two layertransmission using two antenna ports in which transform precoding isdeactivated.

TABLE 14 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-2 $\frac{1}{\sqrt{2}}\begin{bmatrix}1 & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 1 \\1 & {- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 1 \\j & {- j}\end{bmatrix}$

Table 15 below shows an example of precoding matrix for two layertransmission using four antenna ports in which transform precoding isdeactivated.

TABLE 15 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-3 $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\0 & 0 \\0 & 0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 0 \\0 & 1 \\0 & 0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 0 \\0 & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 & 0 \\1 & 0 \\0 & 1 \\0 & 0\end{bmatrix}$ 4-7 $\frac{1}{2}\begin{bmatrix}0 & 0 \\1 & 0 \\0 & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}0 & 0 \\0 & 0 \\1 & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\1 & 0 \\0 & {- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\1 & 0 \\0 & j\end{bmatrix}$  8-11 $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\{- j} & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\{- j} & 0 \\0 & {- 1}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\{- 1} & 0 \\0 & {- j}\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\{- 1} & 0 \\0 & j\end{bmatrix}$ 12-15 $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\j & 0 \\0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 \\0 & 1 \\j & 0 \\0 & {- 1}\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\1 & 1 \\1 & {- 1} \\1 & {- 1}\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\1 & 1 \\j & {- j} \\j & {- j}\end{bmatrix}$ 16-19 $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\j & j \\1 & {- 1} \\j & {- j}\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\j & j \\j & {- j} \\{- 1} & 1\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\{- 1} & {- 1} \\1 & {- 1} \\{- 1} & 1\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\{- 1} & {- 1} \\j & {- j} \\{- j} & j\end{bmatrix}$ 20-21 $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\{- j} & {- j} \\1 & {- 1} \\{- j} & j\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 \\{- j} & {- j} \\j & {- j} \\1 & {- 1}\end{bmatrix}$ — —

Table 16 below shows an example of precoding matrix for three layertransmission using four antenna ports in which transform precoding isdeactivated.

TABLE 16 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-3 $\frac{1}{2}\begin{bmatrix}1 & 0 & 0 \\0 & 1 & 0 \\0 & 0 & 1 \\0 & 0 & 0\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 & 0 \\0 & 1 & 0 \\1 & 0 & 0 \\0 & 0 & 1\end{bmatrix}$ $\frac{1}{2}\begin{bmatrix}1 & 0 & 0 \\0 & 1 & 0 \\{- 1} & 0 & 0 \\0 & 0 & 1\end{bmatrix}$ $\frac{1}{2\sqrt{3}}\begin{bmatrix}1 & 1 & 1 \\1 & {- 1} & 1 \\1 & 1 & {- 1} \\1 & {- 1} & {- 1}\end{bmatrix}$ 4-6 $\frac{1}{2\sqrt{3}}\begin{bmatrix}1 & 1 & 1 \\1 & {- 1} & 1 \\j & j & {- j} \\j & {- j} & {- j}\end{bmatrix}$ $\frac{1}{2\sqrt{3}}\begin{bmatrix}1 & 1 & 1 \\{- 1} & 1 & {- 1} \\1 & 1 & {- 1} \\{- 1} & 1 & 1\end{bmatrix}$ $\frac{1}{2\sqrt{3}}\begin{bmatrix}1 & 1 & 1 \\{- 1} & 1 & {- 1} \\j & j & {- j} \\{- j} & j & j\end{bmatrix}$ —

Table 17 below shows an example of precoding matrix for four layertransmission using four antenna ports in which transform precoding isdeactivated.

TABLE 17 TPMI W index (ordered from left to right in increasing order ofTPMI index) 0-3 $\frac{1}{2}\begin{bmatrix}1 & 0 & 0 & 0 \\0 & 1 & 0 & 0 \\0 & 0 & 1 & 0 \\0 & 0 & 0 & 1\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 & 0 & 0 \\0 & 0 & 1 & 1 \\1 & {- 1} & 0 & 0 \\0 & 0 & 1 & {- 1}\end{bmatrix}$ $\frac{1}{2\sqrt{2}}\begin{bmatrix}1 & 1 & 0 & 0 \\0 & 0 & 1 & 1 \\j & {- j} & 0 & 0 \\0 & 0 & j & {- j}\end{bmatrix}$ $\frac{1}{4}\begin{bmatrix}1 & 1 & 1 & 1 \\1 & {- 1} & 1 & {- 1} \\1 & 1 & {- 1} & {- 1} \\1 & {- 1} & {- 1} & 1\end{bmatrix}$ 4 $\frac{1}{4}\begin{bmatrix}1 & 1 & 1 & 1 \\1 & {- 1} & 1 & {- 1} \\j & j & {- j} & {- j} \\j & {- j} & {- j} & j\end{bmatrix}$ — — —

Power Control (PC)

In the wireless communication system, transmission power of the terminal(e.g., user equipment (UE) and/or a mobile device may be required toincrease or decrease according to a situation. As such, controlling thetransmission power of the UE and/or the mobile device may be referred toas uplink power control. As an example, a transmission power controlscheme may be applied to satisfy a requirement (e.g., Signal-to-NoiseRatio (SNR), Bit Error Ratio (BER), Block Error Ratio (BLER), etc.) in abase station (e.g., gNB, eNB, etc.).

The power control described above may be performed by an open-loop powercontrol scheme and a closed-loop power control scheme.

Specifically, the open-loop power control scheme means a scheme ofcontrolling the transmission power without a feedback from atransmitting device (e.g., the eNB, etc.) to a receiving device (e.g.,UE, etc.) and/or a feedback from the receiving device to thetransmitting device. As an example, the UE may receive a pilotchannel/signal from the eNB and estimate a strength of reception powerby using the received pilot channel/signal. Thereafter, the UE maycontrol the transmission power by using the estimated strength of thereception power.

In contrast, the closed-loop power control scheme means a scheme ofcontrolling the transmission power based on the feedback from thetransmitting device to the receiving device and/or the feedback from thereceiving device to the transmitting device. As an example, the eNBreceives the pilot channel/signal from the UE and determines an optimumpower level of the UE based on a power level, SNR, BEER, BLER, etc.,measured by the received pilot channel/signal. The eNB may transferinformation (i.e., feedback) on the determined optimum power level tothe UE through a control channel and the corresponding UE may controlthe transmission power by using the feedback provided by the eNB.

Hereinafter, a power control scheme for cases where the UE and/or themobile device performs uplink transmission to the eNB in the wirelesscommunication system will be described in detail.

Specifically, hereinafter, power control schemes for transmission of 1)uplink data channel (e.g., Physical Uplink Shared Channel (PUSCH), 2)uplink control channel (e.g., Physical Uplink Control Channel (PUCCH),3) Sounding Reference Signal (SRS), and 4) random access channel (e.g.,Physical Random Access Channel (PRACH) will be described. In this case,a transmission occasion (i.e., transmission time unit) (i) for PUSCH,PUCCH, SRS, and/or PRACH may be defined by slot index n_s in a frame inof a system frame number (SFN), a first symbol S in the slot, the numberL of consecutive symbols, etc.

Power Control of Uplink Data Channel

Hereinafter, for convenience of description, the power control schemewill be described based on the case where the UE performs PUSCHtransmission. The corresponding scheme may be extensively applied toanother uplink data channel supported in the wireless communicationsystem, of course.

In PUSCH transmission in an active uplink UL bandwidth part (UL BWP) ofcarrier f of serving cell c, the UE may calculate a linear power valueof the transmission power determined by Equation P1 below. Thereafter,the corresponding UE may control the transmission power by consideringthe calculated linear power value, the number of antenna ports, and/orthe number of SRS ports.

Specifically, when the UE performs PUSCH transmission in active ULBWP(b) of carrier f of serving cell c using a parameter setconfiguration based on index j and a PUSCH power control adjustmentstate based on index l, the UE may determine PUSCH transmission powerP_(PUSCH,b,f,c)(i,j,q_(d),l) (dBm) in PUSCH transmission occasion ibased on Equation 6 below.

$\begin{matrix}{{P_{{PUSCH},b,f,c}\left( {i,j,q_{d},l} \right)} = {\min{\begin{Bmatrix}{{P_{{CMAX},f,c}(i)},} \\\begin{matrix}{{P_{{O\_ PUSCH},b,f,c}(j)} + {10{\log_{10}\left( {2^{\mu} \cdot {M_{{RB},b,f,c}^{PUSCH}(i)}} \right)}} +} \\{{{\alpha_{b,f,c}(j)} \cdot {{PL}_{b,f,c}\left( q_{d} \right)}} + {\Delta_{{TF},b,f,c}(i)} + {f_{b,f,c}\left( {i,l} \right)}}\end{matrix}\end{Bmatrix}\lbrack{dBm}\rbrack}}} & \left\lbrack {{Equation}\mspace{14mu} 6} \right\rbrack\end{matrix}$

In Equation 6, index j represents an index for an open-loop powercontrol parameter (e.g., Po, alpha (α) etc.) and a maximum of 32parameter sets per cell may be configured. Index q_d represents an indexof a DL RS resource for pathloss (PL) measurement (e.g.,PL_(b,f,c)(q_(d))) and a maximum of four measurement values per cell maybe configured. Index l represents an index for a closed-loop powercontrol process and a maximum of two processes per cell may beconfigured.

Specifically, Po (e.g., P_(O_PUSCH,b,f,c)(j)) as a parameter broadcastedto a part of system information may represent target reception power ata receiver. The corresponding Po value may be configured by consideringa throughput of the UE, a capacity of the cell, noise, and/orinterference. Further, an alpha (e.g., α_(b,f,c)(j)) may represent aratio of performing compensation for pathloss. The alpha may beconfigured to a value of 0 to 1 and full pathloss compensation orfractional pathloss compensation may be performed according to theconfigured value. In this case, the alpha value may be configuredinterference between the UEs and/or a data speed. Further,P_(CMAX,f,c)(i) may represent configured UE transmit power. As anexample, the configured UE transmit power may be construed as‘configured maximum UE output power’ defined in 3GPP TS 38.101-1 and/orTS38.101-2. Further, M_(RB,b,f,c) ^(PUSCH)(i) may represent a bandwidthof PUSCH resource allocation expressed as the number of resource blocks(RBs) for the PUSCH transmission occasion based on subcarrier spacing μ.Further, f_(b,f,c)(i,l) related to the PUSCH power control adjustmentstate may be configured or indicated based on a TPC command field of DCI(e.g., DCI format 0_0, DCI format 0_1, DCI format 2_2, DCI format2_3,etc.).

In this case, a specific Radio Resource Control (RRC) parameter (e.g.,SRI-PUSCHPowerControl-Mapping, etc.) may represent a linkage between theSRS Resource Indicator (SRI) field of downlink control information (DCI)and the indexes j, q_d, and l. In other words, the indexes j, l, and q_dmay be associated with a beam, a panel, and/or a spatial domaintransmission filter based on specific information. Therefore, beam,panel. And/or spatial domain transmission filter unit PUSCH transmissionpower control may be performed.

Parameters and/or information for the PUSCH power control may beindividually (i.e., independently) configured for each BWP. In thiscase, the parameters and/or information may be configured or indicatedthrough higher layer signaling (e.g., RRC signaling, Medium AccessControl-Control Element (MAC-CE), etc.) and/or DCI. As an example, theparameter and/or information for the PUSCH power control may betransferred through RRC signaling PUSCH-ConfigCommon,PUSCH-PowerControl, etc., and PUSCH-ConfigCommon and PUSCH-PowerControlmay be configured as shown in Table 18 below.

TABLE 18 PUSCH-ConfigCommon ::=      SEQUENCE { groupHoppingEnabledTransformPrecoding       ENUMERATED {enabled} pusch-TimeDomainAllocationList           PUSCH-TimeDomainResourceAllocationList  msg3-DeltaPreamble        INTEGER(−1..6)  p0-NominalWithGrant         INTEGER (−202..24)  ... }PUSCH-PowerControl ::= SEQUENCE {  tpc-Accumulation   ENUMERATED {disabled }  msg3-Alpha    Alpha  p0-NominalWithoutGrant   INTEGER(−202..24)  p0-AlphaSets      SEQUENCE (SIZE (1..maxNrofP0-PUSCH-AlphaSets)) OF P0-PUSCH-AlphaSet  pathlossReferenceRSToAddModList         SEQUENCE (SIZE (1..maxNrofPUSCH-PathlossReferenceRSs)) OFPUSCH-PathlossReferenceRS  pathlossReferenceRSToReleaseList  SEQUENCE(SIZE (1..maxNrofPUSCH- PathlossReferenceRSs)) OFPUSCH-PathlossReferenceRS-Id  twoPUSCH-PC-AdjustmentStates    ENUMERATED{twoStates}  deltaMCS     ENUMERATED {enabled} sri-PUSCH-MappingToAddModList      SEQUENCE (SIZE (1..maxNrofSRI-PUSCH-Mappings)) OF SRI-PUSCH-PowerControl sri-PUSCH-MappingToReleaseList     SEQUENCE (SIZE (1..maxNrofSRI-PUSCH-Mappings)) OF SRI-PUSCH-PowerControlId }

The UE may determine or calculate the PUSCH transmission power throughthe scheme and transmit the PUSCH by using the determined or calculatedPUSCH transmission power.

In respect to the PUSCH transmission, there may be the following methodsfor uplink full power transmission.

Option 1: Refinement/adjustment of an uplink codebook may be supported.

-   -   Option 1-1: The UE may support a new codebook subset for        non-coherent and partial-coherent transmittable UE.    -   Option 1-2: Additional scaling factor for the uplink codebook

Option 2: The UE may transparently apply small cyclic or linear delay.

Option 3: Supporting a power control mechanism modified to support theuplink full power transmission without precluding the use of maximumrated PA

Option 4: may depend on implementation of the UE for UE capabilitysignaling of uplink full power transmission.

Uplink transmission of the full transmission power through multiplepower amplifiers for the codebook based uplink transmission fornon-coherent and partial-coherent capable UEs may be supported.

The following options may be additionally considered in relation withthe uplink transmission of the full transmission power.

Option 5: In the case of a precoder in which entries are 0, a linearvalue {circumflex over (P)}_(PUSCH,b,f,c)(i,j,q_(d),l) of the PUSCHtransmission power may be scaled by a ratio α_(Rel-16). A value ofα_(Rel-16) may be selected up to a range in which the UE is implementedwithin a range of [α_(Rel-16), 1]. α_(Rel-16) represents the number ofantenna ports having non-zero PUSCH transmission power and the number ofantenna ports configured for a PUSCH transmission scheme defined in theNR Rel-15 specification.

The UE may be required to maintain a consistent α_(Rel-16) value indifferent cases of PUSCH transmission by using the same precoder for thePUSCH.

The full transmission power uplink transmission having multiple poweramplifiers may be at least supported for the codebook based uplinktransmission for the coherent and partial/non-coherent capable UEs.Supporting such a feature may be represented by the UE as a part of UEcapability signaling.

In the case of power class 3:

UE Capability 1: Full rated PA of each Tx chain may be supported with anew UE function so that the UE may support full Tx power in ULtransmission.

UE Capability 2: It may be assumed that there is no transmission chainof full power with the new UE function in order for the UE to supportthe full transmission power in the UL transmission.

UE Capability 3: A subset of Tx chains having all class PA may besupported as a new UE function in order for the UE to support full Txpower in UL transmission.

FIG. 19 is a diagram illustrating an example of a Radio Frequency (RF)chain of an antenna port to which a method proposed in the presentdisclosure may be applied.

In the case of the codebook based uplink transmission, as shown in Table19 below, when a specific uplink TPMI (e.g., ½*[1 0 0 0]{circumflex over( )}T which is rank1 TPMI 0 of 4 ports) is used, power which may betransmitted by the UE may be determined by a ratio of the number ofports other than 0 in the TPMI indicated by the eNB and the maximumnumber of SRS ports determined by the capability of the UE.

In this case, only ¼ of full power may be used, and as a result, thereis a disadvantage in that coverage is reduced and the present disclosureproposes a scheme for solving the problem.

FIG. 20 is a diagram illustrating an example of timing advanced to whicha method proposed in the present disclosure may be applied.

Timing advanced may be initiated by the eNB together with an MAC messagethat implies and adjusts the timing advanced.

The UE should adjust a timing of an uplink transmission timing of intime slot n+k for a timing advance command received in time slot n. Dueto a channel assessment procedure, even when the UE may not performconfigured uplink transmission, the same requirement may be applied.

The UE may compare a timing of transmission with a timing of precedinguplink transmission with relative accuracy equal to or higher than a UEtiming advance adjustment accuracy requirement and adjust thecorresponding timing to a signaled timing advance value.

TABLE 19 Sub Carrier kHz Timing Spacing, SCS 15 30 60 120 UE ±256 T_(c)±256 T_(c) ±128 T_(c) ±32 T_(c) Advance adjustment accuracy

Timing advance command MAC CE may be identified a lower header of MACPDU with LCID.

The timing advance command MAC CE may have a fixed size as illustratedin FIG. 20 and may be configured as a single octet defined as follows.

-   -   TAG ID (TAG ID): This field represents TAG ID of TAG of which        address is designated. TAG including SpCell has TAG Identity 0.        The length of the field is 2 bits.    -   Timing Advance Command: This field represents index value TA (0,        1, 2 . . . 63) used for controlling a timing adjustment amount        which an MAC entity should apply. The length of the field is 6        bits.

The UE may receive a value N_(TA_offset) of a timing advance offset forthe serving cell by n-TimingAdvanceOffset for the serving cell. Whenn-TimingAdvanceOffset for the serving cell is not provided to the UE,the UE determines the default value N_(TA_offset) of the timing advanceoffset for the serving cell.

When the UE is constituted by two UL carriers for the serving cell, thesame timing advance offset value N_(TA_offset) is applied to bothcarriers.

When receiving a timing advance command or a timing adjustmentindication for TAG, the UE adjusts an uplink timing for PUSCH/SRS/PUCCHtransmission for all serving cells of TAG based on value N_(TA_offset)which the UE expects to be the same.

When the uplink timing for PUSCH/SRS/PUCCH transmission is the same forall serving cells of TAG, the uplink timing is based on all servingcells and the received timing advance command or timing adjustmentindication.

The timing adjustment indication indicates initial time alignment valueN_(TA) used for TAG. In the case of SCS of 2^(μ)·15 kHz, the timingadvance command for TAG as a multiple of 16·64·T_(c)/2^(μ) represents achange of the uplink timing for a current uplink timing for TAG.

In the case of a random access response, the timing advance command forTAG, T_(A) represents N_(TA) by an index value of T_(A)=0, 1, 2, . . . ,3846 and here, an amount of time alignment for TAG having SCS is2^(μ)·15 kHz and N_(TA)=T_(A)·16·64/2^(μ). N_(TA) is related to SCS offirst uplink transmission from the UE after receiving the random accessresponse.

When the UE has multiple active UL BWPs in the same TAG including UL BWPin two UL carriers of the serving cell, a timing advance command valueis relative to the maximum SCS of multiple active UL BWPs. An applicablevalue to UL BWP having lower SCS may be rounded to match timing progressgranularity for UL BWP having lower SCS while satisfying the timingprogress accuracy requirement.

Adjustment of N_(TA) value by a positive or negative amount indicatesadvancing or delaying the uplink transmission timing for TAG by eachcorresponding amount.

In respect to transmission except for PUSCH scheduled by a RAR UL grantand the timing advance command in slot n, corresponding adjustment ofthe uplink transmission timing is applied from the start of uplink slotn+k+1. Here, k=┌N_(slot)^(subframeμ)·(N_(T,1)+N_(T,2)+N_(TA,max)+0.5)/T_(sf)┐ and N_(T,1)represents a duration of symbol N₁ corresponding to a PDSCH receptiontime for UE processing capability 1 when additional PDSCH DM-RS isconfigured and N_(T,2) represents a duration of symbol N₂ correspondingto a PUSCH preparation time for UE processing capability 1. N_(TA,max)represents a maximum timing advance value which may be provided by a TAcommand field of 12 bits and N_(slot) ^(subframeμ) represents the numberof slots per subframe, and T_(sf) represents a subframe duration of 1msec. N₁ and N₂ are determined by minimum SCS of SCS of all configuredUL BWP and SCS of configured DL BWP for all uplink carriers of TAG.

Slot n and N_(slot) ^(subframeμ) are determined for the minimum SCS ofSCS of all UL BWPs configured for all uplink carriers. N_(TA,max) isdetermined for SCS of all configured UL BWPs for all uplink carriers ofTAG and minimum SCS for initial active UL BWP provided byinitialuplinkBWP.

When the UE changes the active UL BWP between a timing advance commandreceiving time and a time to which adjustment corresponding to theuplink transmission timing is applied, the UE determines the timingadvance command value based on SCS of new active UL BWP. When the UEapplies adjustment of the uplink transmission timing and then changesthe active UL BWP, the UE assumes an absolute timing advance commandvalue which is not changed before and after changing the active UL BWP.

When a received downlink timing is changed and compensated onlypartially by uplink timing adjustment without the timing advancecommand, the UE is accordingly changed.

When two adjacent slots overlap with each other due to the TA command,the duration of the latter slot may be reduced compared with theduration of the former slot.

Hereinafter, a method for transmitting the uplink data by using the fullpower transmission power proposed in the present disclosure will bedescribed.

<Proposal 1: When the UE reports UE capability 1, a power scaling valueis calculated as 1 at the time of transmitting the PUSCH for active BWPand antenna ports of performing non-zero power PUSCH transmission of theUE evenly divide and transmit power.>

In the case of the codebook based uplink transmission, when PUSCH powercontrol described above is performed, a ratio of available full power isshown in Tables 20 and 21 below.

Further, in Tables 20 and 21, ρ represents the number of configured SRSports (# of configured SRS ports) or SRS ports which are fully supporteddepending on a UE capability and ρ₀ represents the number of non-zeroelements in the TPMI indicated by the eNB or the number of non-zeropower PUSCH transmission ports. Further, coherent transmission isdefined as follows.

Full coherence: All ports may be coherently transmitted.

Partial coherence: Port pairs may be coherently transmitted.

Non-coherence: Port pairs may not be coherently transmitted.

TABLE 20 Full coherent UE Non coherent UE Non coherent Fully coherentNon coherent TPMI TPMI TPMI Rank 1 TPMI 0.1 0.1 2~5 index${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$ 1/2 1/2 1  Rank 2 TPMI 0   0   1.2 index${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$ 1   1   1  

TABLE 21 Non coherent UE Partial coherent UE Full coherent UE Non NonPartial Non Partial Fully coherent coherent coherent coherent coherentcoherent TPMI TPMI TPMI TPMI TPMI TPMI Rank 1 TPMI 0~3 0~3 4~11 0~3 4~1112-27 index ${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$1/4 1/4 1/2 1/4 1/2 1   Rank 2 TPMI 0~5 0~5 6~13 0~5 6~13 14~21 index${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$ 1/2 1/2 1  1/2 1   1   Rank 3 TPMI 0 0 1.2 0 1.2 3~6 index${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$ 3/4 3/4 1  3/4 1   1   Rank 4 TPMI 0 0 1.2 0 1.2 3.4 index${Ratio}\mspace{14mu}\left( \frac{\rho_{0}}{\rho} \right)$ 1 1 1   1 1  1  

In Proposal 1, when the UE supports UE capability 1, since full powertransmission is available for each of all ports, it is preferable topermit the full power transmission for each port, in order to improveuplink coverage of the UE. To this end, in Proposal 1, when the UEreports UE capability 1 to the eNB, the power scaling factor (value) maybe calculated as 1 regardless of the TPMI indicated by Downlink ControlInformation (DCI) of the eNB at the time of transmitting the PUSCH foractive BWP.

In this case, the UE may evenly distribute the transmission power amongthe antenna ports of performing non-zero power PUSCH transmission andtransmit the PUSCH which is the uplink data. The power control may belimited to specific rank (e.g., when rank is 1) transmission.

In other words, when the value of TRI is 1 in Proposal 1, 1 is used asthe scaling value for determining the transmission power and when theTRI is indicated as another value, the power control method describedabove may be used.

In this case, the UE may directly report the capability of the UE to theeNB or report information (e.g., the maximum port number, a subset ofsupportable TPMI, etc.) associated with the capability.

For example, the UE may directly report to the eNB whether thecapability of the UE is Capability 1, 2, or 3 or transmit to the eNB theinformation associated with the capability. In this case, theinformation associated with the capability may include the maximumnumber of ports which the UE supports for PUSCH transmission and/or thesubset of the TPMI and the subset of the TPMI may include at least oneTPMI supported by the UE.

In the case of uplink full power transmission for capabilities 2 and 3of the UE, the following may be supported.

-   -   In order to support capabilities 2 and 3 according to the        capability of the UE, the UE may be configured as one of two        full power operation modes.    -   The UE may be configured in the network in order to support full        power transmission.    -   mode 1: The UE may be configured by one or more SRS resources        having the same number of SRS ports in an SRS resource set in        which a configuration for the use of a resource is configured to        codebook.

The eNB may configure the UE to so as to use a lower set of TPMI ofgenerating the full power transmission by combining the ports in thelayer.

A new codebook subset may be applied only to a rank value in which thefull power transmission is unavailable in the uplink.

-   -   mode 2: The UE may be configured by several SRS resources having        one SRS resource or a plurality of SRS resources in the SRS        resource set in which the configuration for the use of the        resource is configured to the codebook.

The UE may transmit the SRS and the PUSCH by the same scheme regardlessof the use of antenna virtualization.

Rel-15 codebook and a codebook subset may be used.

The uplink full power transmission may be performed for the PUSCHtransmission according to the indicated SRI and/or TPMI.

-   -   In this regard, for an SRS resource having one or more ports, in        order to at least support UE capability 3, the UE may signal to        the eNB a TPMI set of transferring the full power.

<Proposal 2: When the UE reports UE capability 1, the power scalingvalue is calculated as a at the time of transmitting the PUSCH foractive BWP and antenna ports of performing non-zero power PUSCHtransmission of the UE evenly divide and transmit power. Here, the valueof α may be determined by higher layer signaling (e.g., RRC or MAC CE)or dynamic signaling (e.g., DCI).>

In the case of Proposal 2, even though the UE reports UE capability 1,what power scaling the UE is to perform may be determined by using thehigher layer signaling or dynamic signaling.

As below, as an example for the alpha value according to 1-bitsignaling, when the eNB indicates a state of “0” to the UE, the UEoperates in the existing Rel-15 power control mode to save a battery ofthe UE by performing antenna turn-off in specific port selection or portgroup selection TPMI.

Further, when the eNB indicates a state of “1” to the UE, the UE mayincrease the coverage of the UE by performing full power transmission(e.g., max 23 dBm transmission) regardless of the TPMI indicated by theeNB.

The power control may be limited to be applied only to the case of thespecific rank (e.g., when rank is 1) transmission. In other words, inthe example, in the case of TRI=1, 1 may be used as the scaling valueand when another TRI is indicated, Rel-15 power control may be applied.

TABLE 22 Parameter state α 0 the ratio of the number of antenna portswith a non-zero PUSCH transmission power to the maximum number of SRSports supported by the UE in one SRS resource 1 1

In other words, in Proposal 2, even when the UE directly or indirectlyreports the capability thereof as a capability to enable the full powertransmission, the transmission power may be limited by the alpha valuetransmitted by the eNB.

<Proposal 3: The TPMI by the new codebook subset may be indicatedregardless of reporting of the capability of the UE as the non-coherentor non-and-partial coherent capability. For example, the codebook subsetmay be indicated to the UE by the eNB so that a non-coherent UE also usefully coherent TPMI.>

In other words, even when it is reported to the eNB that the capabilityof the UE is non-coherence or non-and-partial coherence, the eNB mayindicate to the UE the TPMI for PUSCH transmission using the full powertransmission regardless of the capability reported by the UE.

In this case, Proposal 3 may be performed only in the following limitedsituations.

Fully coherence TPMIs may be used only in the case of rank 1 for 2 portsor the fully coherence TPMIs may be used only in the case of rank 1 for4 ports.

Partial coherence TPMIs may be permitted for the non-coherence UE in thecase of ranks 1, 2, and 3 for 4 ports. As the TPMI to which the codebooksubset is applied is distinguished in Tables 20 and 21, the codebooksubset may be applied at TPMI group levels including Non coherent TPMI,Partial coherent TPMI, Fully coherent TPMI, and the like and this may beapplied only to a designated specific rank as described above.

Alternatively, for flexibility, the eNB may indicate to the UElimitation of the codebook subset of all TPMIs with a 9-bit bitmap (6+3)in the case of 2 ports and indicate to the UE the limitation of thecodebook subset of the TPMI with a 62-bit bitmap (28+22+7+5) in the caseof 4 ports.

Alternatively, in order to reduce signaling overhead, the eNB mayindicate to the UE only a codebook subset for a specific rank (e.g.,when a rank value is 1, etc.) as the bitmap. Proposals 3 and 3-1 may beapplied to the case where the UE reports UE capability 2 and/or 3.

If the codebook subset determined by the capability for the full powertransmission is different from the codebook subset related to thecoherent transmission, when both codebook subsets conflict with eachother, for example, when codebook subsets indicated by a full powercapability and a non-coherent capability conflict with each other, thecodebook subset by the full power capability may be further prioritizedor a union of two subsets may become a final codebook subset. The UE maynot expect to receive an indication of TPMI other than the TPMIsincluded in the codebook subset. In other words, when the TPMI valueother than the TPMIs included in the codebook subset is indicated by theeNB, the UE may determine the corresponding indication as a wrongindication.

<Proposal 4: The UE may report to the eNB a subset of TPMI which the UEmay use and apply/transmit through capability signaling for the UE foruplink transmission using full power.>

Proposal 4 is a scheme for covering various RF architectures dependingon UE implementation like UE capability 3. In other words, the eNB mayobtain some information regarding what RF architecture the UE byProposal 3. Accordingly, the proposal may operate in link with Proposal1 or 1-1 based on information which the UE reports as the capabilitythereof.

In other words, when the UE reports to the eNB the codebook subset asthe capability of the UE, the eNB may determine that the uplinktransmission of the corresponding TPMIs is available with the full powerand use 1 as the power scaling value at the time of transmitting thePUSCH using the corresponding TPMI.

Table 23 below shows an example of signaling for reporting thecapability of the UE using a 3-bit bitmap.

TABLE 23 State TPMI subset 0 Non-coherent TPMI 1 Partial-coherent TPMI 2Full-coherent TPMI

Alternatively, the UE may report to the eNB available TPMI among allavailable TPMIs with the 9-bit bitmap (6+3) in the case of 2 ports andreport to the eNB whether to use full TPMI using the 62-bit bitmap(28+22+7+5) in the case of 4 ports.

Such a method may be limited to a specific rank and/or specific TPMIgroup in order to reduce overhead of signaling for the capability of theUE.

For example, when the UE reports the capability to the eNB only withrank 1 and the non-coherent codebook, the UE may report to the eNB anavailable part with a 2-bit bitmap (TPMIs 0 and 1) for 2 ports and a4-bit bitmap (TPMIs 0 to 3) for 4 ports.

As another example, when the UE reports the capability to the eNB onlywith rank 1 and the non-partial coherent codebook, the UE may report tothe eNB information on available TPMI with the 2-bit bitmap for 2 portsas it is and a 12-bit bitmap (TPMIs 0 to 11) for 4 ports.

In the bitmap, “0” indicates not available and “1” indicates available(or vice versa). Alternatively, when only rank 1 is used, 6 bits may beused for 2 ports and 28 bits may be used for 4 ports. In the case of thefull power transmittable rank limitation, the UE may configure theinformation as a separate field (2-port 2 bit and 4-port 4 bit) andreport the information to the eNB.

In other words, in Proposal 4, the UE may transmit the informationassociated with the capability, which includes a subset of TPMIincluding at least one TPMI capable of performing the uplinktransmission with the full transmission power by the UE whiletransmitting the information associated with the capability of the UE tothe eNB.

In this case, when a control message (e.g., DCI) transmitted from theeNB, which includes at least one TPMI transmitted by the UE isindicated, the UE may transmit the uplink data using the fulltransmission power. In other words, in this case, the uplink data may betransmitted through the transmission power by configuring the scalingvalue to ‘1’.

However, when the TPMI indicated by the eNB is not included in at leastone subset, the UE may transmit the uplink data with a value smallerthan the full transmission power. In other words, in this case, theuplink data may be transmitted through the transmission power byconfiguring the scaling value to a value smaller than ‘1’.

<Proposal 4-1: Based on the codebook subset (via UE capabilitysignaling) reported by Proposal 4, a size of a TRI+TPMI field in the DCIindicated by the eNB is reduced to reduce a DCI payload.>

In the case of Proposal 4-1, for example, when the UE reports to the eNBthe information associated with the capability thereof with a bitmap of[1 0 1 1 1 1 1 1 1] among 2-port 9-bit bitmaps, the size of the TRI+TPMIfield in the DCI may indicate the TPMI which the UE uses for the PUSCHtransmission with a bitwidth which is reduced from existing 4 bits to 3bits.

<Proposal 4-2: By UE capability 1, 2, 3, and/or coherency capability(non, partial, full coherence) reported by the UE, the eNB indicates tothe UE the codebook subset to be used by the UE through a higher layer(e.g., MAC CE or DCI).>

For example, when the UE reports to the eNB UE capability 2 andnon-coherent capability, the eNB may not indicate a subset ofnon-coherent TPMI (e.g., 2-port TPMI index 0 to 1 for rank 1) only forcoherency transmission like Rel-15, but use non-and-fully coherent TPMI,i.e., (e.g., 2-port TPMI index 0 to 5 for rank 1) and the limitation maybe configured only for a specific rank. When the codebook subsetsindicated by the full power capability and the non-coherent capabilityconflict with each other, the codebook subset by the full powercapability may be further prioritized or the union of two subsets may bethe final codebook subset.

<Proposal 5: For coherence uplink transmission of the UE, the eNB mayindicate to the UE per port (or per beam or per antenna or panel) timingadvance.>

It is proposed that in the case of UE capabilities 2 and 3, for fullpower uplink transmission, a higher TPMI subset higher than the coherenttransmission capability thereof is used. In such a case, according to achannel experienced by the UE, in any case, when an uplink signaltransmitted in each port a good capability is received by the eNB, aphase is well-matched in a most uplink scheduling band, and as a result,the UE shows a good capability, while in any case, the phase is notwell-matched in the uplink scheduling band, and as a result, thecapability may be degraded.

Accordingly, the eNB may calculate optimum timing advance (TA) per portbased on, for example, information measured from SRS or the channelreciprocity and indicate the optimum TA to the UE and the UE may use theoptimum TA for uplink full power transmission using the information. Inthe case of the proposal, the codebook based uplink transmission isdescribed as an example, but the proposal may be applied even to thenon-codebook based UL. The scheme of independently configuring the TAper antenna may be used for compensating capability degradation byacquiring an effect of small-delay cyclic-delay-diversity (CDD)according to an indicated resolution of the TA. Accordingly, theresolution of the TA may have a time resolution (e.g., OFDM symbol levelor less) different from a TA offset value configured by MAC-CE.

<Proposal 5-1: In the case of Proposal 5, since it may be inefficient toallocate independent TA for each port, the signaling overhead may beeffectively reduced in the form of Common TA+Differential TA.>

Basically, the TA is indicated to the UE through MAC CE (e.g., 12 bits).Accordingly, both Common TA and differential TA proposed above may beindicated through the MAC CE and differential bit may be used forfine-tuning with bit-width smaller than bit-width of a common value.Alternatively, it may be considered that in order to more efficientlyuse Proposal 5 or 5-1, common TA is indicated through MAC CE (e.g., 12bits) and differential TA is signaled to the UE through DCI (e.g., 2bits).

Table 24 below shows an example in which differential TA is indicatedthrough 2-bit signaling. In the proposal, common TA may be a valueallocated to the UE and there may be a scheme in which differential TAis independently applied to all ports which the UE uses for the uplinktransmission. Alternatively, common TA may use a specific reference port(e.g., port 0) and the remaining port (or beam or antenna or panel) isindicated by differential TA to further reduce the payload (e.g., DCI).

TABLE 24 Differential State TA value 00 0 01 +1 10 +2 11 −1

Proposals 1 to 5-1 described above may be used singly or as acombination of the proposals.

FIG. 21 illustrates an example of an operation flowchart of an eNBreceiving uplink data to which a method proposed in the presentdisclosure may be applied.

Referring to FIG. 21, the eNB may receive from the UE informationassociated with a capability of the UE (S21010). For example, the eNBmay receive from the UE information including information (e.g.,capability 1, 2 or 3) directly indicating the capability of the UE orreceive from the UE information including information (e.g., # ofsupported ports, coherency capability, and full power transmissioncapability) indirectly indicating the capability of the UE.

For example, the eNB may receive from the UE information including aTPMI subset including at least one TPMI capable of transmitting theuplink data with the maximum number of ports and/or the fulltransmission power supported by the UE.

Thereafter, the eNB may transmit system information and schedulinginformation to the UE through the higher layer signaling (S21020). Inthis case, the system information and scheduling information may betransmitted through a higher layer (e.g., RRC or MAC CE).

Thereafter, the eNB may transmit a reference signal (e.g., SRSSB,CSI-RS, TRS, or PT-RS) for acquiring an uplink channel state and adownlink channel state (S21030) and the UE may transmit to the eNB an RS(e.g., SRS) in order to acquire uplink link channel state information ofthe UE.

Thereafter, the eNB may acquire channel state information from the UE(S21040) and the eNB may indicate to the UE uplink schedulinginformation and SRI/TPMI/TRI/MCS information by using the acquiredchannel information of the UE (S21050). In this case, the uplinkscheduling information and the SRI/TPMI/TRI/MCS information may beincluded in the DCI and transmitted.

Thereafter, the eNB may receive from the UE uplink data and a referencesignal for decoding the uplink data (S21060). In other words, the eNBmay receive from the UE data to which precoding is applied and an RS(e.g., DMRS) (scheduled) for data decoding.

FIG. 22 illustrates an example of an operation flowchart of an eNBreceiving uplink data to which a method proposed in the presentdisclosure may be applied.

The UE may transmit to the eNB information associated with a capabilityof the UE (S22010). For example, the UE may transmit to the eNBinformation including information (e.g., capability 1, 2, or 3) directlyindicating the capability of the UE or transmit to the eNB informationincluding information (e.g., # of supported ports, coherency capability,and full power transmission capability) indirectly indicating thecapability of the UE (S22010).

For example, the UE may transmit to the eNB information including a TPMIsubset including at least one TPMI capable of transmitting the uplinkdata with the maximum number of ports and/or the full transmission powersupported by the UE.

Thereafter, the UE may receive from the eNB system information andscheduling information through the higher layer signaling (S22020). Inthis case, the system information and the scheduling information may bereceived through a higher layer (e.g., RRC or MAC CE).

Thereafter, the UE may receive a reference signal (e.g., SRSSB, CSI-RS,TRS, or PT-RS) for acquiring an uplink channel state and a downlinkchannel state (S22030) and the UE may transmit to the eNB an RS (e.g.,SRS) in order to acquire uplink link channel state information of theUE.

Thereafter, the UE may transmit channel state information to the eNB(S22040) and receive from the eNB an indication of uplink schedulinginformation and SRI/TPMI/TRI/MCS information based on channelinformation (S22050). In this case, the uplink scheduling informationand the SRI/TPMI/TRI/MCS information may be included in the DCI andreceived.

Thereafter, the UE transmit to the eNB uplink data and a referencesignal for decoding the uplink data (S22060). In other words, the UE maytransmit from the eNB data to which precoding is applied and an RS(e.g., DMRS) (scheduled) for data decoding.

FIG. 23 illustrates an example of an operation flowchart of a UE fordetermining transmission power for transmitting uplink data to which amethod proposed in the present disclosure may be applied.

The UE may transmit to the eNB information associated with a capabilityof the UE (S23010). For example, as described in Proposals 1 to 5-1 andFIG. 22, the UE may transmit to the eNB information includinginformation (e.g., capability 1, 2, or 3) directly indicating thecapability of the UE or transmit to the eNB information includinginformation (e.g., # of supported ports, coherency capability, and fullpower transmission capability) indirectly indicating the capability ofthe UE.

For example, the UE may transmit to the eNB information including a TPMIsubset including at least one TPMI capable of transmitting the uplinkdata with the maximum number of ports and/or the full transmission powersupported by the UE.

For example, an operation of the UE (e.g., reference numeral 2510 and/or2520 of FIGS. 25 to 29) which transmits the information in step S23010described above may be implemented by devices of FIGS. 25 to 28 to bedescribed below. For example, referring to FIG. 25, one or moreprocessors 102 may control one or more transceivers 106 and/or one ormore memories 104 so as to transmit the configuration information andone or more transceivers 106 may transmit the information.

Thereafter, the UE may receive from the eNB Downlink Control Information(DCI) for transmitting uplink data (S23020).

In this case, the DCI may include a TPMI used for the UE to transmit theuplink data. In other words, the DCI may include a TPMI to be used whichthe UE configured by the eNB is to use for transmitting the uplink data.

For example, an operation of the UE (e.g., reference numeral 2510 and/or2520 of FIGS. 25 to 29) which receives the DCI in step S23020 describedabove may be implemented by devices of FIGS. 25 to 28 to be describedbelow. For example, referring to FIG. 25, one or more processors 102 maycontrol one or more transceivers 106 and/or one or more memories 104 soas to receive the DCI and one or more transceivers 106 may receive theDCI.

Thereafter, the UE may transmit the uplink data to the eNB by usingtransmission power determined based on the TPMI (S23030). For example,when the TPMI indicated by the eNB through the DCI is included in the atleast one TPMI included in information which the UE reports to the eNB,the UE may transmit the uplink data to the eNB through full transmissionpower.

An operation of the UE (e.g., reference numeral 2510 and/or 2520 ofFIGS. 25 to 29) which transmits the uplink data in step S23030 describedabove may be implemented by devices of FIGS. 25 to 28 to be describedbelow. For example, referring to FIG. 25, one or more processors 102 maycontrol one or more transceivers 106 and/or one or more memories 104 soas to transmit the uplink data and one or more transceivers 106 maytransmit the uplink data.

In this case, the scaling factor for determining the transmission powermay be configured to ‘1’.

However, when the TPMI indicated by the eNB through the DCI is notincluded in the at least one TPMI included in information which the UEreports to the eNB, the UE may transmit the uplink data to the eNBthrough transmission power smaller than the full transmission power.

In this case, the scaling factor for determining the transmission powermay be configured to a value smaller than ‘1’.

In the embodiment, the UE may receive from the eNB an RRC messageincluding the full transmission power usable by the UE and the RRCmessage may further include mode information related to at least onetransmission mode which may be applied to the UE. Further, wheninformation reported to the eNB by the UE is information related to aspecific capability of the UE, the transmission power for transmittingthe uplink data may be configured as the full transmission power.Alternatively, when the information reported to the eNB by the UE is theinformation associated with the specific capability of the UE, a scalingvalue for determining the transmission power may be received from theeNB. Further, the transmission power determined based on the scalingvalue may be evenly distributed among a single or a plurality of antennaports using non-zero power for transmitting an uplink channel.

FIG. 24 illustrates an example of an operation flowchart of an eNB fordetermining transmission power for transmitting uplink data to which amethod proposed in the present disclosure may be applied.

Referring to FIG. 24, the eNB may receive from the UE informationrelated to a capability of the UE (S24010). For example, as described inProposals 1 to 5-1 and FIG. 21, the UE may transmit to the eNBinformation including information (capability 1, 2, or 3) directlyindicating the capability of the UE or transmit to the eNB informationincluding information (e.g., # of supported ports, coherency capability,and full power transmission capability) indirectly indicating thecapability of the UE.

For example, the UE may transmit to the eNB information including a TPMIsubset including at least one TPMI capable of transmitting the uplinkdata with the maximum number of ports and/or the full transmission powersupported by the UE.

For example, an operation of the UE (e.g., reference numeral 2510 and/or2520 of FIGS. 25 to 29) which transmits the information in step S24010described above may be implemented by devices of FIGS. 25 to 29 to bedescribed below. For example, referring to FIG. 25, one or moreprocessors 102 may control one or more transceivers 106 and/or one ormore memories 104 so as to transmit the information and one or moretransceivers 106 may receive the information.

Thereafter, the eNB may transmit from the UE Downlink ControlInformation (DCI) for transmitting uplink data (S24020).

In this case, the DCI may include a TPMI used for the UE to transmit theuplink data. In other words, the DCI may include a TPMI to be used whichthe UE configured by the eNB is to use for transmitting the uplink data.

For example, an operation of the eNB (e.g., reference numeral 2510and/or 2520 of FIGS. 25 to 29) which transmits the DCI in step S24020described above may be implemented by devices of FIGS. 25 to 29 to bedescribed below. For example, referring to FIG. 25, one or moreprocessors 102 may control one or more transceivers 106 and/or one ormore memories 104 so as to transmit the DCI and one or more transceivers106 may transmit the DCI.

Thereafter, the eNB may receive the uplink data from the UE throughtransmission power determined based on the TPMI (S24030). For example,when the TPMI indicated by the eNB through the DCI is included in the atleast one TPMI included in information which the UE reports to the eNB,the eNB may receive the uplink data from the UE through fulltransmission power.

For example, an operation of the eNB (e.g., reference numeral 2510and/or 2520 of FIGS. 25 to 29) which receives the uplink data in stepS25020 described above may be implemented by devices of FIGS. 25 to 29to be described below. For example, referring to FIG. 25, one or moreprocessors 102 may control one or more transceivers 106 and/or one ormore memories 104 so as to transmit the uplink data and one or moretransceivers 106 may transmit the uplink data.

In this case, the scaling factor for determining the transmission powermay be configured to ‘1’.

However, when the TPMI indicated by the eNB through the DCI is notincluded in the at least one TPMI included in information which the UEreports to the eNB, the eNB may receive the uplink data from the UEthrough transmission power smaller than the full transmission power.

In this case, the scaling factor for determining the transmission powermay be configured to a value smaller than ‘1’.

In the embodiment, the eNB may transmit to the UE an RRC messageincluding the full transmission power usable by the UE and the RRCmessage may further include mode information related to at least onetransmission mode which may be applied to the UE. Further, wheninformation reported to the eNB by the UE is information related to aspecific capability of the UE, the transmission power for transmittingthe uplink data may be configured as the full transmission power.

Further, in the methods and embodiments, the UE and/or the eNB whichoperate according to each of the steps of FIGS. 21 to 24 may bespecifically implemented by devices of FIGS. 25 to 29 to be describedbelow. For example, the eNB may correspond to a first wireless deviceand the UE may correspond to a second wireless device and in some cases,an opposite thereto may also be considered.

For example, the eNB/UE signaling and operation (e.g., FIGS. 21 to 24)may be processed by one or more processors (e.g., 102 and 202) of FIGS.25 to 29 and the eNB/UE signaling and operation (e.g., FIGS. 18 to 21)may be stored in a memory (e.g., one or more memories (e.g., 104 and204) of FIGS. 22 to 26) in the form of a command/program (e.g.,instruction and executable code) for driving at least one processor(e.g., 102 and 202) of FIGS. 25 to 29.

Communication System Applied to the Present Disclosure

The various descriptions, functions, procedures, proposals, methods,and/or operational flowcharts of the present disclosure described inthis document may be applied to, without being limited to, a variety offields requiring wireless communication/connection (e.g., 5G) betweendevices.

Hereinafter, a description will be given in more detail with referenceto the drawings. In the following drawings/description, the samereference symbols may denote the same or corresponding hardware blocks,software blocks, or functional blocks unless described otherwise.

FIG. 25 illustrates a communication system applied to the presentdisclosure.

Referring to FIG. 25, a communication system 2500 applied to the presentdisclosure includes wireless devices, Base Stations (BSs), and anetwork. Herein, the wireless devices represent devices performingcommunication using Radio Access Technology (RAT) (e.g., 5G New RAT(NR)) or Long-Term Evolution (LTE)) and may be referred to ascommunication/radio/5G devices. The wireless devices may include,without being limited to, a robot 2510 a, vehicles 2510 b-1 and 2510b-2, an eXtended Reality (XR) device 2510 c, a hand-held device 2510 d,a home appliance 2510 e, an Internet of Things (IoT) device 2510 f, andan Artificial Intelligence (AI) device/server 400. For example, thevehicles may include a vehicle having a wireless communication function,an autonomous driving vehicle, and a vehicle capable of performingcommunication between vehicles. Herein, the vehicles may include anUnmanned Aerial Vehicle (UAV) (e.g., a drone). The XR device may includean Augmented Reality (AR)/Virtual Reality (VR)/Mixed Reality (MR) deviceand may be implemented in the form of a Head-Mounted Device (HMD), aHead-Up Display (HUD) mounted in a vehicle, a television, a smartphone,a computer, a wearable device, a home appliance device, a digitalsignage, a vehicle, a robot, etc. The hand-held device may include asmartphone, a smartpad, a wearable device (e.g., a smartwatch or asmartglasses), and a computer (e.g., a notebook). The home appliance mayinclude a TV, a refrigerator, and a washing machine. The IoT device mayinclude a sensor and a smartmeter. For example, the BSs and the networkmay be implemented as wireless devices and a specific wireless device2520 a may operate as a BS/network node with respect to other wirelessdevices.

The wireless devices 2510 a to 2510 f may be connected to the network300 via the BSs 2520. An AI technology may be applied to the wirelessdevices 2510 a to 2510 f and the wireless devices 2510 a to 2510 f maybe connected to the AI server 400 via the network 300. The network 300may be configured using a 3G network, a 4G (e.g., LTE) network, or a 5G(e.g., NR) network. Although the wireless devices 2510 a to 2510 f maycommunicate with each other through the BSs 2520/network 300, thewireless devices 2510 a to 2510 f may perform direct communication(e.g., sidelink communication) with each other without passing throughthe BSs/network. For example, the vehicles 2510 b-1 and 2510 b-2 mayperform direct communication (e.g. Vehicle-to-Vehicle(V2V)/Vehicle-to-everything (V2X) communication). The IoT device (e.g.,a sensor) may perform direct communication with other IoT devices (e.g.,sensors) or other wireless devices 2510 a to 2510 f.

Wireless communication/connections 150 a, 150 b, or 150 c may beestablished between the wireless devices 2510 a to 2510 f/BS 2520, or BS2520/BS 2520. Herein, the wireless communication/connections may beestablished through various RATs (e.g., 5G NR) such as uplink/downlinkcommunication 150 a, sidelink communication 150 b (or, D2Dcommunication), or inter BS communication (e.g. relay, Integrated AccessBackhaul(IAB)). The wireless devices and the BSs/the wireless devicesmay transmit/receive radio signals to/from each other through thewireless communication/connections 150 a and 150 b. For example, thewireless communication/connections 150 a and 150 b may transmit/receivesignals through various physical channels. To this end, at least a partof various configuration information configuring processes, varioussignal processing processes (e.g., channel encoding/decoding,modulation/demodulation, and resource mapping/demapping), and resourceallocating processes, for transmitting/receiving radio signals, may beperformed based on the various proposals of the present disclosure.

Devices Applicable to the Present Disclosure

FIG. 26 illustrates wireless devices applicable to the presentdisclosure.

Referring to FIG. 26, a first wireless device 2510 and a second wirelessdevice 2520 may transmit radio signals through a variety of RATs (e.g.,LTE and NR). Herein, {the first wireless device 2510 and the secondwireless device 2520} may correspond to {the wireless device 2510 x andthe BS 2520} and/or {the wireless device 2510 x and the wireless device2510 x} of FIG. 25.

The first wireless device 2510 may include one or more processors 102and one or more memories 104 and additionally further include one ormore transceivers 106 and/or one or more antennas 108. The processor(s)102 may control the memory(s) 104 and/or the transceiver(s) 106 and maybe configured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 102 may process informationwithin the memory(s) 104 to generate first information/signals and thentransmit radio signals including the first information/signals throughthe transceiver(s) 106. The processor(s) 102 may receive radio signalsincluding second information/signals through the transceiver 106 andthen store information obtained by processing the secondinformation/signals in the memory(s) 104. The memory(s) 104 may beconnected to the processor(s) 102 and may store a variety of informationrelated to operations of the processor(s) 102. For example, thememory(s) 104 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 102or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 102 and the memory(s) 104 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 106 may be connected to the processor(s) 102 andtransmit and/or receive radio signals through one or more antennas 108.Each of the transceiver(s) 106 may include a transmitter and/or areceiver. The transceiver(s) 106 may be interchangeably used with RadioFrequency (RF) unit(s). In the present disclosure, the wireless devicemay represent a communication modem/circuit/chip.

The second wireless device 2520 may include one or more processors 202and one or more memories 204 and additionally further include one ormore transceivers 206 and/or one or more antennas 208. The processor(s)202 may control the memory(s) 204 and/or the transceiver(s) 206 and maybe configured to implement the descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument. For example, the processor(s) 202 may process informationwithin the memory(s) 204 to generate third information/signals and thentransmit radio signals including the third information/signals throughthe transceiver(s) 206. The processor(s) 202 may receive radio signalsincluding fourth information/signals through the transceiver(s) 206 andthen store information obtained by processing the fourthinformation/signals in the memory(s) 204. The memory(s) 204 may beconnected to the processor(s) 202 and may store a variety of informationrelated to operations of the processor(s) 202. For example, thememory(s) 204 may store software code including commands for performinga part or the entirety of processes controlled by the processor(s) 202or for performing the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.Herein, the processor(s) 202 and the memory(s) 204 may be a part of acommunication modem/circuit/chip designed to implement RAT (e.g., LTE orNR). The transceiver(s) 206 may be connected to the processor(s) 202 andtransmit and/or receive radio signals through one or more antennas 208.Each of the transceiver(s) 206 may include a transmitter and/or areceiver. The transceiver(s) 206 may be interchangeably used with RFunit(s). In the present disclosure, the wireless device may represent acommunication modem/circuit/chip.

Hereinafter, hardware elements of the wireless devices 2510 and 2520will be described more specifically. One or more protocol layers may beimplemented by, without being limited to, one or more processors 102 and202. For example, the one or more processors 102 and 202 may implementone or more layers (e.g., functional layers such as PHY, MAC, RLC, PDCP,RRC, and SDAP). The one or more processors 102 and 202 may generate oneor more Protocol Data Units (PDUs) and/or one or more Service Data Unit(SDUs) according to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document. Theone or more processors 102 and 202 may generate messages, controlinformation, data, or information according to the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document. The one or more processors 102 and 202 maygenerate signals (e.g., baseband signals) including PDUs, SDUs,messages, control information, data, or information according to thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document and provide thegenerated signals to the one or more transceivers 106 and 206. The oneor more processors 102 and 202 may receive the signals (e.g., basebandsignals) from the one or more transceivers 106 and 206 and acquire thePDUs, SDUs, messages, control information, data, or informationaccording to the descriptions, functions, procedures, proposals,methods, and/or operational flowcharts disclosed in this document.

The one or more processors 102 and 202 may be referred to ascontrollers, microcontrollers, microprocessors, or microcomputers. Theone or more processors 102 and 202 may be implemented by hardware,firmware, software, or a combination thereof. As an example, one or moreApplication Specific Integrated Circuits (ASICs), one or more DigitalSignal Processors (DSPs), one or more Digital Signal Processing Devices(DSPDs), one or more Programmable Logic Devices (PLDs), or one or moreField Programmable Gate Arrays (FPGAs) may be included in the one ormore processors 102 and 202. The descriptions, functions, procedures,proposals, methods, and/or operational flowcharts disclosed in thisdocument may be implemented using firmware or software and the firmwareor software may be configured to include the modules, procedures, orfunctions. Firmware or software configured to perform the descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be included in the one or more processors102 and 202 or stored in the one or more memories 104 and 204 so as tobe driven by the one or more processors 102 and 202. The descriptions,functions, procedures, proposals, methods, and/or operational flowchartsdisclosed in this document may be implemented using firmware or softwarein the form of code, commands, and/or a set of commands.

The one or more memories 104 and 204 may be connected to the one or moreprocessors 102 and 202 and store various types of data, signals,messages, information, programs, code, instructions, and/or commands.The one or more memories 104 and 204 may be configured by Read-OnlyMemories (ROMs), Random Access Memories (RAMs), Electrically ErasableProgrammable Read-Only Memories (EPROMs), flash memories, hard drives,registers, cash memories, computer-readable storage media, and/orcombinations thereof. The one or more memories 104 and 204 may belocated at the interior and/or exterior of the one or more processors102 and 202. The one or more memories 104 and 204 may be connected tothe one or more processors 102 and 202 through various technologies suchas wired or wireless connection.

The one or more transceivers 106 and 206 may transmit user data, controlinformation, and/or radio signals/channels, mentioned in the methodsand/or operational flowcharts of this document, to one or more otherdevices. The one or more transceivers 106 and 206 may receive user data,control information, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, from one or moreother devices. For example, the one or more transceivers 106 and 206 maybe connected to the one or more processors 102 and 202 and transmit andreceive radio signals. For example, the one or more processors 102 and202 may perform control so that the one or more transceivers 106 and 206may transmit user data, control information, or radio signals to one ormore other devices. The one or more processors 102 and 202 may performcontrol so that the one or more transceivers 106 and 206 may receiveuser data, control information, or radio signals from one or more otherdevices. The one or more transceivers 106 and 206 may be connected tothe one or more antennas 108 and 208 and the one or more transceivers106 and 206 may be configured to transmit and receive user data, controlinformation, and/or radio signals/channels, mentioned in thedescriptions, functions, procedures, proposals, methods, and/oroperational flowcharts disclosed in this document, through the one ormore antennas 108 and 208. In this document, the one or more antennasmay be a plurality of physical antennas or a plurality of logicalantennas (e.g., antenna ports). The one or more transceivers 106 and 206may convert received radio signals/channels etc. from RF band signalsinto baseband signals in order to process received user data, controlinformation, radio signals/channels, etc. using the one or moreprocessors 102 and 202. The one or more transceivers 106 and 206 mayconvert the user data, control information, radio signals/channels, etc.processed using the one or more processors 102 and 202 from the baseband signals into the RF band signals. To this end, the one or moretransceivers 106 and 206 may include (analog) oscillators and/orfilters.

Signal Processing Circuit Example to Which Present Disclosure is Applied

FIG. 27 illustrates a signal processing circuit for a transmit signal.

Referring to FIG. 27, a signal processing circuit 2700 may include ascrambler 2710, a modulator 2720, a layer mapper 2730, a precoder 2740,a resource mapper 2750, and a signal generator 2760. Although notlimited thereto, an operation/function of FIG. 27 may be performed bythe processors 102 and 202 and/or the transceivers 106 and 206 of FIG.26. Hardware elements of FIG. 27 may be implemented in the processors102 and 202 and/or the transceivers 106 and 206 of FIG. 26. For example,blocks 2710 to 2760 may be implemented in the processors 102 and 202 ofFIG. 26. Further, blocks 2710 to 2750 may be implemented in theprocessors 102 and 202 of FIG. 26 and the block 2760 of FIG. 26 and theblock 2760 may be implemented in the transceivers 106 and 206 of FIG.26.

A codeword may be transformed into a radio signal via the signalprocessing circuit 2700 of FIG. 27. Here, the codeword is an encoded bitsequence of an information block. The information block may includetransport blocks (e.g., a UL-SCH transport block and a DL-SCH transportblock). The radio signal may be transmitted through various physicalchannels (e.g., PUSCH and PDSCH).

Specifically, the codeword may be transformed into a bit sequencescrambled by the scrambler 2710. A scramble sequence used for scramblingmay be generated based on an initialization value and the initializationvalue may include ID information of a wireless device. The scrambled bitsequence may be modulated into a modulated symbol sequence by themodulator 2720. A modulation scheme may include pi/2-BPSK(pi/2-BinaryPhase Shift Keying), m-PSK(m-Phase Shift Keying), m-QAM(m-QuadratureAmplitude Modulation), etc. A complex modulated symbol sequence may bemapped to one or more transport layers by the layer mapper 2730.Modulated symbols of each transport layer may be mapped to acorresponding antenna port(s) by the precoder 2740 (precoding). Output zof the precoder 2740 may be obtained by multiplying output y of thelayer mapper 2730 by precoding matrix W of N*M. Here, N represents thenumber of antenna ports and M represents the number of transport layers.Here, the precoder 2740 may perform precoding after performing transformprecoding (e.g., DFT transform) for complex modulated symbols. Further,the precoder 2740 may perform the precoding without performing thetransform precoding.

The resource mapper 2750 may map the modulated symbols of each antennaport to a time-frequency resource. The time-frequency resource mayinclude a plurality of symbols (e.g., CP-OFDMA symbol and DFT-s-OFDMAsymbol) in a time domain and include a plurality of subcarriers in afrequency domain. The signal generator 2760 may generate the radiosignal from the mapped modulated symbols and the generated radio signalmay be transmitted to another device through each antenna. To this end,the signal generator 2760 may include an Inverse Fast Fourier Transform(IFFT) module, a Cyclic Prefix (CP) inserter, a Digital-to-AnalogConverter (DAC), a frequency uplink converter, and the like.

A signal processing process for a receive signal in the wireless devicemay be configured in the reverse of the signal processing process (2710to 2760) of FIG. 27. For example, the wireless device (e.g., 100 or 200of FIG. 26) may receive the radio signal from the outside through theantenna port/transceiver. The received radio signal may be transformedinto a baseband signal through a signal reconstructer. To this end, thesignal reconstructer may include a frequency downlink converter, ananalog-to-digital converter (ADC), a CP remover, and a Fast FourierTransform (FFT) module. Thereafter, the baseband signal may bereconstructed into the codeword through a resource de-mapper process, apostcoding process, a demodulation process, and a de-scrambling process.The codeword may be reconstructed into an original information block viadecoding. Accordingly, a signal processing circuit (not illustrated) forthe receive signal may include a signal reconstructer, a resourcedemapper, a postcoder, a demodulator, a descrambler, and a decoder.

Example of a wireless device applied to the present disclosure

FIG. 28 illustrates another example of a wireless device applied to thepresent disclosure. The wireless device may be implemented in variousforms according to a use-case/service (refer to FIG. 28).

Referring to FIG. 28, wireless devices 2510 and 2520 may correspond tothe wireless devices 2510 and 2520 of FIG. 19 and may be configured byvarious elements, components, units/portions, and/or modules. Forexample, each of the wireless devices 2510 and 2520 may include acommunication unit 110, a control unit 120, a memory unit 130, andadditional components 140. The communication unit may include acommunication circuit 112 and transceiver(s) 114. For example, thecommunication circuit 112 may include the one or more processors 102 and202 and/or the one or more memories 104 and 104 of FIG. 26. For example,the transceiver(s) 114 may include the one or more transceivers 106 and106 and/or the one or more antennas 108 and 108 of FIG. 26. The controlunit 120 is electrically connected to the communication unit 110, thememory 130, and the additional components 140 and controls overalloperation of the wireless devices. For example, the control unit 120 maycontrol an electric/mechanical operation of the wireless device based onprograms/code/commands/information stored in the memory unit 130. Thecontrol unit 120 may transmit the information stored in the memory unit130 to the exterior (e.g., other communication devices) via thecommunication unit 110 through a wireless/wired interface or store, inthe memory unit 130, information received through the wireless/wiredinterface from the exterior (e.g., other communication devices) via thecommunication unit 110.

The additional components 140 may be variously configured according totypes of wireless devices. For example, the additional components 140may include at least one of a power unit/battery, input/output (I/O)unit, a driving unit, and a computing unit. The wireless device may beimplemented in the form of, without being limited to, the robot (2510 aof FIG. 25), the vehicles (2510 b-1 and 2510 b-2 of FIG. 25), the XRdevice (2510 c of FIG. 25), the hand-held device (2510 d of FIG. 25),the home appliance (2510 e of FIG. 25), the IoT device (2510 f of FIG.25), a digital broadcast terminal, a hologram device, a public safetydevice, an MTC device, a medicine device, a fintech device (or a financedevice), a security device, a climate/environment device, the AIserver/device (400 of FIG. 25), the BSs (2520 of FIG. 25), a networknode, etc. The wireless device may be used in a mobile or fixed placeaccording to a use-example/service.

In FIG. 28, the entirety of the various elements, components,units/portions, and/or modules in the wireless devices 2510 and 2520 maybe connected to each other through a wired interface or at least a partthereof may be wirelessly connected through the communication unit 110.For example, in each of the wireless devices 2510 and 2520, the controlunit 120 and the communication unit 110 may be connected by wire and thecontrol unit 120 and first units (e.g., 130 and 140) may be wirelesslyconnected through the communication unit 110. Each element, component,unit/portion, and/or module within the wireless devices 2510 and 2520may further include one or more elements. For example, the control unit120 may be configured by a set of one or more processors. As an example,the control unit 120 may be configured by a set of a communicationcontrol processor, an application processor, an Electronic Control Unit(ECU), a graphical processing unit, and a memory control processor. Asanother example, the memory 130 may be configured by a Random AccessMemory (RAM), a Dynamic RAM (DRAM), a Read Only Memory (ROM)), a flashmemory, a volatile memory, a non-volatile memory, and/or a combinationthereof

Portable Device Example to which Present Disclosure is Applied

FIG. 29 illustrates a portable device applied to the present disclosure.The portable device may include a smart phone, a smart pad, a wearabledevice (e.g., a smart watch, a smart glass), and a portable computer(e.g., a notebook, etc.). The portable device may be referred to as aMobile Station (MS), a user terminal (UT), a Mobile Subscriber Station(MSS), a Subscriber Station (SS), an Advanced Mobile Station (AMS), or aWireless terminal (WT).

Referring to FIG. 29, a portable device 2510 may include an antenna unit108, a communication unit 110, a control unit 120, a memory unit 130, apower supply unit 140 a, an interface unit 140 b, and an input/outputunit 140 c. The antenna unit 108 may be configured as a part of thecommunication unit 110. The blocks 110 to 130/140 a to 140 c correspondto the blocks 110 to 130/140 of FIG. 25, respectively.

The communication unit 110 may transmit/receive a signal (e.g., data, acontrol signal, etc.) to/from another wireless device and eNBs. Thecontrol unit 120 may perform various operations by controllingcomponents of the portable device 2510. The control unit 120 may includean Application Processor (AP). The memory unit 130 may storedata/parameters/programs/codes/instructions required for driving theportable device 2510. Further, the memory unit 130 may storeinput/output data/information, etc. The power supply unit 140 a maysupply power to the portable device 2510 and include a wired/wirelesscharging circuit, a battery, and the like. The interface unit 140 b maysupport a connection between the portable device 2510 and anotherexternal device. The interface unit 140 b may include various ports(e.g., an audio input/output port, a video input/output port) for theconnection with the external device. The input/output unit 140 c mayreceive or output a video information/signal, an audioinformation/signal, data, and/or information input from a user. Theinput/output unit 140 c may include a camera, a microphone, a user inputunit, a display unit 140 d, a speaker, and/or a haptic module.

As one example, in the case of data communication, the input/output unit140 c may acquire information/signal (e.g., touch, text, voice, image,and video) input from the user and the acquired information/signal maybe stored in the memory unit 130. The communication unit 110 maytransform the information/signal stored in the memory into the radiosignal and directly transmit the radio signal to another wireless deviceor transmit the radio signal to the eNB. Further, the communication unit110 may receive the radio signal from another wireless device or eNB andthen reconstruct the received radio signal into originalinformation/signal. The reconstructed information/signal may be storedin the memory unit 130 and then output in various forms (e.g., text,voice, image, video, haptic) through the input/output unit 140 c.

The embodiments described above are implemented by combinations ofcomponents and features of the present disclosure in predeterminedforms. Each component or feature should be considered selectively unlessspecified separately. Each component or feature may be carried outwithout being combined with another component or feature. Moreover, somecomponents and/or features are combined with each other and canimplement embodiments of the present disclosure. The order of operationsdescribed in embodiments of the present disclosure may be changed. Somecomponents or features of one embodiment may be included in anotherembodiment, or may be replaced by corresponding components or featuresof another embodiment. It is apparent that some claims referring tospecific claims may be combined with another claims referring to theclaims other than the specific claims to constitute the embodiment oradd new claims by means of amendment after the application is filed.

Embodiments of the present disclosure can be implemented by variousmeans, for example, hardware, firmware, software, or combinationsthereof. When embodiments are implemented by hardware, one embodiment ofthe present disclosure can be implemented by one or more applicationspecific integrated circuits (ASICs), digital signal processors (DSPs),digital signal processing devices (DSPDs), programmable logic devices(PLDs), field programmable gate arrays (FPGAs), processors, controllers,microcontrollers, microprocessors, and the like.

When embodiments are implemented by firmware or software, one embodimentof the present disclosure can be implemented by modules, procedures,functions, etc. performing functions or operations described above.Software code can be stored in a memory and can be driven by aprocessor. The memory is provided inside or outside the processor andcan exchange data with the processor by various well-known means.

It is apparent to those skilled in the art that the present disclosurecan be embodied in other specific forms without departing from essentialfeatures of the present disclosure. Accordingly, the aforementioneddetailed description should not be construed as limiting in all aspectsand should be considered as illustrative. The scope of the presentdisclosure should be determined by rational construing of the appendedclaims, and all modifications within an equivalent scope of the presentdisclosure are included in the scope of the present disclosure.

According to an embodiment of the present disclosure, the presentdisclosure can provide a method for transmitting and receiving data in awireless communication system.

Furthermore, according to an embodiment of the present disclosure, datacan be transmitted by using full transmission power configured by a basestation when a terminal transmits uplink data to the base station.

Furthermore, according to an embodiment of the present disclosure, thebase station acquires information associated with a capability of theterminal to configure a TPMI according to the capability of theterminal.

Effects obtainable from the present disclosure are not limited by theeffects mentioned above, and other effects which are not mentioned abovecan be clearly understood from the following description by thoseskilled in the art to which the present disclosure pertains.

Although a scheme of transmitting and receiving data in a wirelesscommunication system of the present disclosure has been described withreference to an example applied to a 3GPP LTE/LTE-A system or a 5Gsystem (New RAT system), the scheme may be applied to various wirelesscommunication systems in addition to the 3GPP LTE/LTE-A system or 5Gsystem.

What is claimed is:
 1. A method for transmitting a Physical UplinkShared Channel (PUSCH) by a User Equipment (UE) in a wirelesscommunication system, the method comprising: transmitting, to a basestation, capability information, wherein the capability informationincludes information for indicating a specific transmit precoding matrixindicator (TPMI) subgroup which delivers full transmission power, andwherein the specific TPMI subgroup reported by the UE includes aprecoding matrix which (i) is used for single layer transmission using 4antenna ports with full transmission power and (ii) comprises a singlecolumn containing at least one ‘0’; receiving, from the base station,configuration information for the PUSCH via Radio Resource Control (RRC)signaling; receiving, from the base station, Downlink ControlInformation (DCI) for scheduling a PUSCH transmission, wherein the DCIincludes a field, wherein the field is for precoding information and anumber of layers; and transmitting, to the base station, the PUSCH on 4antenna ports, wherein based on that a TPMI given by the fieldcorresponds to the precoding matrix included in the specific TPMIsubgroup, (i) the PUSCH is transmitted based on the precoding matrix and(ii) a power scaling factor for the PUSCH transmission is equal to ‘1’,and wherein a transmission power for the PUSCH transmission is equallysplit across antenna ports on which the PUSCH is transmitted withnon-zero power.
 2. The method of claim 1, wherein the capabilityinformation further includes information for coherence capability of theUE, and wherein non-coherence or partial coherence is reported based onthe information for coherence capability.
 3. The method of claim 2,wherein based on (i) the non-coherence being reported and (ii) the TPMIgiven by the field being corresponded to the precoding matrix, the PUSCHis transmitted with full transmission power.
 4. The method of claim 1,wherein the transmission power for the PUSCH transmission is fulltransmission power.
 5. The method of claim 1, wherein the precodingmatrix used for full transmission power is ${\frac{1}{2}\begin{bmatrix}1 \\0 \\0 \\0\end{bmatrix}}.$
 6. The method of claim 1, wherein the precoding matrixused for full transmission power is one of ${\frac{1}{2}\begin{bmatrix}1 \\0 \\1 \\0\end{bmatrix}},{\frac{1}{2}\begin{bmatrix}1 \\0 \\{- 1} \\0\end{bmatrix}},{\frac{1}{2}\begin{bmatrix}1 \\0 \\j \\0\end{bmatrix}},{{or}\mspace{14mu}{{\frac{1}{2}\begin{bmatrix}1 \\0 \\{- j} \\0\end{bmatrix}}.}}$
 7. The method of claim 1, wherein the configurationinformation includes mode information related with at least onetransmission mode applicable to the UE.
 8. The method of claim 1,further comprising: receiving, from the base station, a timing advancecommand via MAC-CE signaling.
 9. The method of claim 8, furthercomprising: receiving, from the base station, information for a timingadvance configured per each antenna port.
 10. A user equipment (UE)configured to transmit a Physical Uplink Shared Channel (PUSCH) in awireless communication system, the UE comprising: one or moretransceivers; one or more processors; and one or more memories storinginstructions that, based on being executed by the one or moreprocessors, control the UE to perform operations including:transmitting, to a base station, capability information, wherein thecapability information includes information for indicating a specifictransmit precoding matrix indicator (TPMI) subgroup which delivers fulltransmission power, and wherein the specific TPMI subgroup reported bythe UE includes a precoding matrix which (i) is used for single layertransmission using 4 antenna ports with full transmission power and (ii)comprises a single column containing at least one ‘0’; receiving, fromthe base station, configuration information for the PUSCH via RadioResource Control (RRC) signaling; receiving, from the base station,Downlink Control Information (DCI) for scheduling a PUSCH transmission,wherein the DCI includes a field, wherein the field is for precodinginformation and a number of layers; and transmitting, to the basestation, the PUSCH on 4 antenna ports, wherein based on that a TPMIgiven by the field corresponds to the precoding matrix included in thespecific TPMI subgroup, (i) the PUSCH is transmitted based on theprecoding matrix and (ii) a power scaling factor for the PUSCHtransmission is equal to ‘1’, and wherein a transmission power for thePUSCH transmission is equally split across antenna ports on which thePUSCH is transmitted with non-zero power.
 11. The UE of claim 10,wherein the capability information further includes information forcoherence capability of the UE, and wherein non-coherence or partialcoherence is reported based on the information for coherence capability.12. The UE of claim 11, wherein based on (i) the non-coherence beingreported and (ii) the TPMI given by the field being corresponded to theprecoding matrix, the PUSCH is transmitted with full transmission power.13. The UE of claim 10, wherein the transmission power for the PUSCHtransmission is full transmission power.
 14. The UE of claim 10, whereinthe precoding matrix used for full transmission power is${\frac{1}{2}\begin{bmatrix}1 \\0 \\0 \\0\end{bmatrix}}.$
 15. The UE of claim 10, wherein the precoding matrixused for full transmission power is one of ${\frac{1}{2}\begin{bmatrix}1 \\0 \\1 \\0\end{bmatrix}},{\frac{1}{2}\begin{bmatrix}1 \\0 \\{- 1} \\0\end{bmatrix}},{\frac{1}{2}\begin{bmatrix}1 \\0 \\j \\0\end{bmatrix}},{{or}\mspace{14mu}{{\frac{1}{2}\begin{bmatrix}1 \\0 \\{- j} \\0\end{bmatrix}}.}}$
 16. A method for receiving a Physical Uplink SharedChannel (PUSCH) by a base station in a wireless communication system,the method comprising: receiving, from a user equipment (UE), capabilityinformation, wherein the capability information includes information forindicating a specific transmit precoding matrix indicator (TPMI)subgroup which delivers full transmission power, and wherein thespecific TPMI subgroup reported from the UE includes a precoding matrixwhich (i) is used for single layer transmission using 4 antenna portswith full transmission power and (ii) comprises a single columncontaining at least one ‘0’; transmitting, to the UE, configurationinformation for the PUSCH via Radio Resource Control (RRC) signaling;transmitting, to the UE, Downlink Control Information (DCI) forscheduling a PUSCH transmission, wherein the DCI includes a field,wherein the field is for precoding information and a number of layers;and receiving, from the UE, the PUSCH on 4 antenna ports, wherein basedon that a TPMI given by the field corresponds to with the precodingmatrix included in the specific TPMI subgroup, (i) the PUSCH is receivedbased on the precoding matrix and (ii) a power scaling factor for thePUSCH transmission is equal to ‘1’, and wherein a transmission power forthe PUSCH transmission is equally split across antenna ports on whichthe PUSCH is transmitted with non-zero power.
 17. A base stationconfigured to receive a Physical Uplink Shared Channel (PUSCH) in awireless communication system, the base station comprising: one or moretransceivers; one or more processors; and one or more memories storinginstructions that, based on being executed by the one or moreprocessors, control the base station to perform operations including:receiving, from a user equipment (UE), capability information, whereinthe capability information includes information for indicating aspecific transmit precoding matrix indicator (TPMI) subgroup whichdelivers full transmission power, and wherein the specific TPMI subgroupreported from the UE includes a precoding matrix which (i) is used forsingle layer transmission using 4 antenna ports with full transmissionpower and (ii) comprises a single column containing at least one ‘0’;transmitting, to the UE, configuration information for the PUSCH viaRadio Resource Control (RRC) signaling; transmitting, to the UE,Downlink Control Information (DCI) for scheduling a PUSCH transmission,wherein the DCI includes a field, wherein the field is for precodinginformation and a number of layers; and receiving, from the UE, thePUSCH on 4 antenna ports, wherein based on that a TPMI given by thefield corresponds to the precoding matrix included in the specific TPMIsubgroup, (i) the PUSCH is received based on the precoding matrix and(ii) a power scaling factor for the PUSCH transmission is equal to ‘1’,and wherein a transmission power for the PUSCH transmission is equallysplit across antenna ports on which the PUSCH is transmitted withnon-zero power.